The problem is still unsolved. I tried to make disable-always, but I cant find that control. Here screenshot of my section
Short description: Here I used a dynamic layout and put inside a section (which is also a dynamic layout but with repeat grid)
On dynamic layout I have 3 tabs: General (which defines style of layout, visibility and identifiers with Accessibility, probably last could help somehow, I`ll try this for now, but maybe it wont help), presentation and action and I cant find here field with name disable
In that dynamic layout I put a section, which has 2 tab: general and presentation
in presentation tab I have field "edit-options" which set in read-only(always) and advanced presentation options, maybe it could also help, but I still dont know
The thing is, If your main section has properties/fields with edit options(In presentation tab) as 'Editable always' then even if you embed this section in some other section and marking this section include as 'read only' still those fields will be shown as editable .
As solution you need to change the edit option on those fields to 'Auto'[Please check attachment for reference.]