Bass rich earbuds

Soundcore liberty air 2 pro. Because I’m so fed up of the overblown (albeit smooth and deep) bass, could be just what you want.

For quality to £ ratio it's pretty hard to beat Earfun, the ones I have have a bass boost function

https://www.myearfun.com/uk/headphones/earfun-air-pro-sv-anc-true-wireless-earbuds-black

My partner has ones that cost half as much and also sound fantastic, they're just a bit older, don't have active noise cancelling and don't look quite as nice

Since I've been in China, I've been able to see a large array of home-grown brands used locally, as compared to back home and the limited ones available that all the kids get (Sony/Beats)

I quite like FiiO equipment. Reasonable price, good longevity, good sound quality. Their bluetooth dongles and IEMs, with 2.5mm balanced cables are a good start. Currently using the F9 IEM and a Btr3k dongle after a sale. Now it's about the quality of the files I use. The loud noises I used to listen to when young (all-nighters, and things that go bang/boom) means my hearing is not 100% anymore, but I still want to enjoy bass that makes you feel like you're dying and your soul is being ripped out of your chest with joy. The F9SE currently sells for £24.60 over here. The wide array of earphones available would have you lost for days finding them on sale, and reading discussions on Head-fi.