I literally feel your pain .... I've been dealing with this for nearly 2 years now.
I wish I could offer some tips and advice ..... but I can't.
I've recently bought a brace which does offer some relief and I find that when I'm sat down and put my bare feet (socks still on) on the floor, this also offers some relief as well.
Exercising helps some days .... and on other days it just makes it worse.
Some braces are £20+ but I found one on Ebay that was a lot cheaper, so I thought I'd take a punt and buy it and it's quite sturdy to be honest, I'm surprised at the quality considering how cheap it was.
Here's the exact brace that I bought:
https://www.ebay.co.uk/itm/385418548355