The prompt needs to be started at some point. Took a while to get whonixsetup right back then. Such interactive questions aren’t great. Bad usability.
Looking at DNSCrypt - List of public DoH and DNSCrypt servers there’s not much users who could make good decisions by looking at DNSCrypt - List of public DoH and DNSCrypt servers
That information would have to be parsed and prepared for the user.
I don’t think asking the user is worth it here. Would be same mess if we started asking about Suggest Trustworthy Tor Hidden Services as Time Sources for sdwdate.