Hi @Liamp972 If you have tried all the suggestions,reset and repaired to no avail best to contact Samsung Support. It is possible to replace the one Bud if by any chance you do not have Warranty. https://www.samsung.com//support/mobile-devices/how-to-couple-with-a-newly-purchased-earbud-and-a-us...
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .