I don't know if something has changed and I've somehow missed it but the choice between Dynamic content and Expressions seems to have gone from most of the fields in flow. (even those that currently have expresssions in them)
I found a couple of answers that said it could be due to working on a small screen but I don't think that applies to me as I am working on 3 pretty large screens, all of which were working fine up until yesterday.
Has it simply moved somewhere and I'm too blind to see it?