League of Legends (LoL) Question: no support when I go adc? (unranked)

I play adc and support but whenever I go adc it seems like there are no supports. I'm close to playing ranked so I'm hoping it will get better there but in normal games it's like supports don't even exist unless they call adc second and have no choice. I used to play Xayah and Jinx adc but I'm looking into Miss Fortune. I really want to get better at her and naturally if I just play vs ai it'll be too easy, so I go into a normal match, call adc, but I either have to play support because they're whining and can't play anything else or I'll play adc with a bad (doesn't synergise)/no support or even with another adc. Most of the time I play bot lane as either support, or if I'm adc, with another champ that's not supp. None of my friends play supp either. I really want to get better at MF but I feel like I'm not unlocking her full potential when all I'm doing is farming and staying off to the side because I'm squishy and I'm hesitant to engage. What can I do about this?