Align symbol with notehead (like an accidental)

Hello, is it possible to do this? Specifically in guitar tablature. I tried fiddling with settings but could only find options for above/below staff. I also tried dragging the glyph around for alignment, but can’t get it to move far enough (it would also require a different position offset for each string).
I’d like to be able to insert symbols directly next to guitar tab notes on their string - without having to drag each and every one down from above (because for what I am doing, there will be a lot!)

What are the symbols? Is there a possibility you could build them as custom accidentals?

I can’t think of a good automatic way to achieve this at the moment, I’m afraid. Can you attach a picture showing the kind of thing you’re trying to achieve?