Hopefully in the next days/weeks we’ll see TB5 external enclosures and you’ll be able to hit very fast speeds with the new Macs. I would wait for those before getting another enclosure now.

Afaik the main oem producer is Winstars, though I could only find sketchy-looking Aliexpress seller so far.

https://www.winstars.com/en_us/category/Thunderbolt_5.html