From my experience, dell has the best linux support for touch. Until Framework makes touch screens for their laptops maybe try going for dell.
Also, this is just my suggestion, research on your own as you are doing, since you know what you want best.
I feel like there should be a dedicated fedihelp community for stuff like this. Also, if you have any microblog account (like mastodon), try asking for help with hashtags like #fedihelp or mentioning the account @[email protected] if you don’t get any answer here.