Customized attributes on users

We have been using custom attributes on our users by adding their badge ID numbers for our office door RFID reader and I created a system that works with MQTT and logs people scanning their badges and unlocked certain doors.
with the new HA update, you removed the customize feature that makes it very hard for us to add/edit/remove custom attributes on users. now only I know how to do it because I know the YAML file format but other people don’t know.
Could you please bring back the customize in a secure way into the system so we can keep manage our users and their access through the UI?

Thank you