Have you run a diagnostic via your Samsung Members App to see if a fault shows ?
Also check there's no debris in the speakers with a torch.
Finally soft reboot by turning the phone Off and On and then see what happens @DEDemonEmperor
A Samsung Experience Store or Samsung Service Centre can check out the phone.
If you try to buy speakers you may buy inferior parts and possibly cause further damage inside, and introduce dust particles, and void any remaining warranty.
The Samsung Community Forum Rules stipulate > Community-policy-on-dangerous-diy-unorthodox-repair-advice.
I wish you all the best. Take care. 😎
Daily Driver > Samsung Galaxy s²³ Ultra 512Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
