Read_only - how to set dynamically

Hello,
still need support on this question, please.
Find attached some exercises without being able to set read_only dynamically.
Read_only Dynamic 02.xlsx (10.6 KB)

Can anyone provide an example where dynamic setting s working for read_only, please.

I copy in @Xiphware as he earlier mentioned read_only is working dynamically here:
Dynamic Constraint Message (Logic expression) - #3 by Xiphware >> post 3

Maybe this issue needs to be forwarded to development? @jnm
It is necessary to allow read_only to be set dynamically. Just an example: If a birth date is recorded, age can be calculated (set to read_only = yes), otherwise age has to be entered…

The finding might be related with this topic:

Thanks in advance.
Kind regards
Wolfgang