...but cryptocurrency sportsbooks unfortunately do not have the UK license.
Actually, that's inaccurate.
The UKGC license doesn't
easily allow holders to accept crypto deposits. In that list I count at least 2 of the crypto bookies you mentioned who actually
do have the UKGC license, so I know for sure you're mistaken
So while they're known as crypto bookies, it is simply that their UK versions of casinos/books don't accept crypto deposits.