I finally have time to answer this! Sorry it took so long. Thanks for asking!

I have written orgasm delay/characters needing to wait until they are told to come, Not Yet (a 221b format fic), and Agony and Ecstasy (a short orgasm denial fic)

For knife play I have a few, but more unfinished on my drive than posted there are 3 published:

Gemini is a peculiar darker fic, so people should heed the tags, but it does have a pretty Mormor knifeplay scene in the middle.

There is some sheriarty knife play in No Exit, but again the fic is dark.

Red is a happy consensual johnlock knife play scene.

I haven’t attempted a coffee shop AU yet, but that might be fun. Maybe a queer coffee shop