First answer is yes, it affects. You can choose Johnny option if you give your body to Johnny and make him romance with Rogue.
Second answer is you leave the city with her when you romanced Panam, but if your character female V, you can't romance with her. I didn't play Corpo ending but Panam just calls you on that ending, i guess. On Johnny ending you interact her, but you didn't want spoilers so not gonna give details.
Third answer is yes kinda if you romanced with Judy on Nomad ending, you leave the city with her and Panam.
I may be wrong at some points because i didn't play female V and Corpo Ending.