Recomended android 13 mount / rw how to?

Hi Folks,
A bit of searching suggests attempting common remount of /system seems not supported in android 13.
/system and / seem on same partition, and:

1|redfin:/ # mount -o rw,remount /                                                                                                 
mount: '/dev/block/dm-8'->'/': I/O error
1|redfin:/ # 

What’s the recommended procedure to write to /system (and / for that matter).

Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online servicesphone

Have you tried using TWRP ?