Perhaps I am just an ignorant American... but what makes this bill unpopular to LR deputies in particular? My impression is that they are heavily concentrated among the very wealthiest and most economically right-wing constituencies in France at this point, with little remaining downmarket base, and should be as in favor or even more in favor than LREM from an ideological perspective. I recognize that perhaps they are trying to avoid taking a position on an issue that is unpopular with the general public, but is it actually unpopular with the sort of people who would consider voting for LR in the first place?
I don't know much about which seats they hold, but their true old money base in the wealthy parts of Paris and its vicinity flipped to LREM in 2022. That said, I don't really understand the reason for their opposition either, though I wonder if some of it is just meant to "stick it" to Macron, as their new leader is a far right triangulator who opposed Macron in 2022 and 2017.