Your problem is similar to mine. I used 'dmctl replace'.

https://gist.github.com/doshiraki/3d3a89993d25b3a9122e1eca72841a53?permalink_comment_id=5547999#gistcomment-5547999

On a Pixel 7a with LineageOS, adb remount fails with "failed to remount partition dev:/dev/block/dm-0 mnt:/: Permission denied" or mount fails with "/dev/block/dm-0 is read-only" because Device Mapper (dmctl) locks partitions as read-only due to dm-verity and A/B partitioning.