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Mark narrates that Jesus appeared in different form in Mark 16:12
Afterward Jesus appeared in a different form to two of them while they were walking in the country.
Luke narrates that disciples could not identify him in Luke 24:16
but they were kept from recognizing him.
Was Jesus transformed his physical appearance (Jesus changed his face) or was it the crucifixion incident and physical abuse that Jesus suffered, his face could not be recognized.
The event described in Mark 16:12 of which it is a summary (cf. Luke 24:13–32) says “their eyes were prevented from recognizing Him” (Luke 24:16, nasb). This makes it clear that the miraculous element was not in Jesus’ body, but in the eyes of the disciples (Luke 24:16, 31). Recognition of Jesus was kept from them until their eyes were opened.
This is not to be understood of any change in the shape of His body, or the features of His face; for as soon as their eyes were opened, which had been before held, they knew Him perfectly well: whereas, if there had been such an alteration made in Him, that He could not have been known for the same, there would have been no need of holding their eyes, that they should not know Him, (Luke 24:16, Luke 24:31).
Whatever “another form” means, it certainly does not mean a form other than His real physical, material body. For, on this very occasion Jesus ate physical food, which later in this very chapter He gave as a proof that He was “flesh and bones” and not an immaterial “spirit” (Luke 24:38–43).
Finally, “another form” probably means other than that of a gardener for which Mary mistook Him earlier (John 20:15). Here Jesus appeared in the form of a traveler (Luke 24:13–14).
Reference:
Bible Study Tools (John Gill's exposition of the Bible: Mark 16:12) - https://www.google.com/amp/s/www.biblestudytools.com/commentaries/gills-exposition-of-the-bible/mark-16-12.html%3famp
Jesus now has a glorified body like the heavenly hosts (“angels”) and therefore can disguise Himself
“And no wonder, for even Satan disguises himself as an angel of light.” 2 Corinthians 11:14
This was not the first time Jesus was not recognized by the disciples. He was able to disguise Himself in multiple forms, apparently even as an elderly person
“Just as day was breaking, Jesus stood on the shore; yet the disciples did not know that it was Jesus. Jesus said to them, "Come and have breakfast." Now none of the disciples dared ask him, "Who are you?" They knew it was the Lord.” John 21:4, 12
Whatever body He has, we too shall be of different bodies of glory
“For this perishable body must put on the imperishable, and this mortal body must put on immortality.” 1 Corinthians 15:53
And even the heavenly bodies will vary in degrees of glory (one way to think of glory is, what it is most renowned for, trait, ability, strength)
“There are heavenly bodies and earthly bodies, but the glory of the heavenly is of one kind, and the glory of the earthly is of another.” 1 Corinthians 15:40
And therefore since we will be LIKE Him, it follows that He has a heavenly, glorified body.
“Just as we have borne the image of the man of dust, we shall also bear the image of the man of heaven.” 1 Corinthians 15:49
We have been predestined IN HIM to be glorified also with these imperishable bodies
“But thanks be to God, who gives us the victory through our Lord Jesus Christ.” 1 Corinthians 15:57
I agree completely with Nihil Sine Deo, but I'm also assuming that what he means is, Jesus was NOT resurrected back into his old physical body, but instead into a glorified body like the heavenly hosts, and with this new, spiritual body, he could change his form, enter rooms with locked doors etc. Before his crucifixion, Jesus never changed his "form" to prevent people from seeing him, instead we're told that he slipped away from the crowds, eluded the grasp of his pursuers, and was constantly escaping from people. And no one had any trouble recognizing him. But after his resurrection, now people didn't recognize him, he appeared in various forms, and could enter a locked room. So, something was VERY different about Jesus now.
