I've discussed this in other threads that could maybe be found via search but I will repeat my steps here:
1) Use the detail tool
because it's a nice way to establish the demarcation of the area to show as enlarged (typically bathrooms) but leave the detail bubble without any text.
2) create a new plan view
for enlarged plan (with layers and scale, etc as needed).
3) Place the enlarged plan view in your layout and choose it as an auto text reference
(I do this by selecting and using the contextual menu).
4) Now place some text (using the text tool) in the detail bubble and use the auto text reference as the text.
There's probably fancier ways to do it but this works and keeps everything linked.
Nattering nabob of negativism
(2022 MBP M1 still in the box)