Hi @Adel_de_Clevermate 
, I see multiple kind of changes on your question.
- Layout changes (as you said, forest admin related eg: workspaces)
- database schema changes (table, smart features on your agent)
For layout changes, no problem, you can do a change on production and this change should be applied on all child environment.
For agent change (.forestadmin-schema.json) you should sync your env code between your environment for deploy/push layout changes.
Let me know if that help 