These, combined with the fact she was in the outfit from her first appearance as regular cast (to all intents, I know she didn’t get the outfit till her second episode, but there were photo calls etc.) strongly implies a ‘casting couch’ scenario.
The allegations against Braga (who I can’t stand, for much the same set of rumours combined with interviews that suggest there’s something not right in the state of Denmark. But that supposition forming my opinion, and yours, we simply don’t have facts) basically outright say ‘he uses casting couch’ which combined with your mentioning the ‘rumour’ imply and paint a picture.
Do I think Braga would behave that way? Quite possibly.
Is there evidence? No.
Is there evidence it didn’t happen? Yes. Interviews with Ryan for a start, and the fact they dated later on, and that there has been no stories of such that I have heard...whilst hearing about plenty of other stuff.
Do I think Ryan would behave that way? No.
Is there evidence? Yes. She was already a rising star in Hollywood tv and even SF fandom. After her divorce she was likely to be trying to avoid any scandal, and this would not fit with that.
Is there evidence it did happen after all? No. Aside from rumour and the documented on-set bullying at the time suggesting why this rumour would get fuelled, it seems that some people simply add two and two and get seven.
It’s just a big accusation against Jeri as much as Braga.