Why not raise an issue on xorgxrdp for the answer from the devs? We can only speculate on the AUR comments.
Thankfully, someone has already asked and the answer is: "It's not out yet, but it's pretty imminent." https://github.com/neutrinolabs/xorgxrdp/issues/360#issuecomment-2545158754
Pinned Comments
Abzie commented on 2024-05-10 14:40 (UTC)
If upgrading from 0.9.x, please read the 'User Changes' section from the release page:https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.0
There is one breaking change that require manual intervention but there are three other changes that will continue to work for now.
xRDP states: Users are urged to heed any generated configuration warnings and update their configurations. Later major versions of xrdp may remove these warnings, or introduce other behaviours for the affected parameters.