Stained dark armpits? How to fix it?

Please no judgement, it's so embarrassing and I hate it. I've switched to natural deodrant and I've noticed a difference but it's still there. I'm considering waxing but that isn't possible right now due to covid-19 restrictions. Would that make a difference? I'd rather wait to get them done professionally than try myself. Any tips? Advice? Please and thank you