There are three separate questions here that should not be confused.
The Temple as a Metaphor:
The earthly temple/tabernacle/sanctuary was used as Jewish metaphor for several things such as
- Jesus as Messiah in various ways such as the sacrificial lamb (John 1:29, Rom 8:3, 1 Cor 5:7, Heb 9:12); Jesus was the bread of life (6:35-51); The light of the Menorah represented Jesus (John 8:12, 9:5); Jesus was the door (John 10:7-9); Jesus opened the curtain to the Most Holy Place (2 Cor 3:13-16, Heb 6:19, 9:3, 10:20); Jesus is represented as our great High Priest and intercessor in heaven (Heb 4:16, 7:25, 10:22, Rom 8:26, 34, 1 John 2:1, 2, 1 Tim 2:5, John 14:6);
- The Temple represented Jesus’ body (John 2:19-21)
- The Temple represented a Christian’s body (1 Cor 6:19, 20).
- The Temple represents the community of believers (or church) (1 Cor 3:16, 17)
Earthly Sanctuary vs Heavenly Sanctuary
The fact that Moses was shown something in the mountain does not suggest that the earthly sanctuary was anything like the heavenly sanctuary. It could NOT have been - there is no sacrifice in heaven, there are real angels not just embroidered ones, the heavenly is much larger. However, the earthly temple/tabernacle represented the work of Jesus and His mediatorial work of intercession as our Great High priest in Heaven (Heb 4:16, 7:25, 10:22, Rom 8:26, 34, 1 John 2:1, 2, 1 Tim 2:5, John 14:6).
The note about Moses building the sanctuary according to the "pattern" (Ex 25:9, 40, 26:30, Num 8:4, etc) in the mountain is the same word used to describe what Solomon built in 1 Chron 28:19 which was quite different. In 1 Kings 16:10 the same word is used to describe the "sketch" sent by Ahaz to Jerusalem. (See also Isa 44:13) Therefore, the earthly sanctuary was not a copy of the heavenly but a teaching device to teach about heavenly realities (Heb 9:11-14, 10:1) that "is not part of this creation". So the earthly could NOT be physically similar to the heavenly.
Heavenly Realities
None of the above should detract from some reality, left without description, in heaven; that is the "true tabernacle" (Heb 8:2, 9:8), that Christ entered (Heb 6:19, 20) after His ascension, and where Christ ministers and intercedes. We have no idea about what this looks like or anything much about it at all except that Jesus is our High Priest there (Heb 4:14, 15, 7:26, 10:22, Rom 8:26, 34, 1 John 2:1, 2, 1 Tim 2:5, etc.)