The crucifixion of Jesus represented multiple fulfilment’s. His death needed to by account of the Mosaic Law - and although this could have been via any means, i.e. stoning - it couldn’t be via any other means other than crucifixion - because this was prophesied. But this to one side, because you are asking about the lashing, that is, the treatment before crucifixion.
This is a part of the whole picture, namely, suffering on account of ‘sin’ - ours! Not his! ‘Sin’ is something done in the flesh - and the penalty for it is death, of the flesh. ‘Sin’ is punished in the flesh, so Jesus’s ‘flesh’ had to ‘pay the price’. And, that beating/lashing/etc had to result in, end with the ‘death’ of the flesh. Isaiah 53 graphically outlines this process!
There are multiple facets to this event, and this is just one, so does not present the total ‘picture’. But seeing you only asked about the … [snip] “Process of Crucifixion in terms of Lashing”, I’ll only answer that part.
The ‘lashing’ was not symbolic. It was necessary. It had to be so - because that is the judgement ‘sin’ demands.