I have the same problem with wifi not recognized by Ubuntu 25.04. I will try to reseat the M.2 card, and power cycle as mentioned in another thread. However, I would like to explore more about this problem & the link to the tutorial does not resolve.
Beelink CS, a you recheck the URL to the tutorial and let me know how to access?
Otherwise loving the product!
Thanks,
John
PS - Here is photo of SN: 