My view has always been that the outcome is the same regardless of whether a stranger on a dating app just stops responding to messages, or sends a final message saying “just to let you know, I’m not interested in carrying this conversation on any more and won’t be replying to you again.” It’s done, either way, and the latter isn’t going to make you feel any better about things than the hard stop if you’d felt the conversation was going somewhere.
Ultimately, it’s never a good idea to play message badminton for weeks on end, feeling as though you’re building a connection and becoming close via the app messages, inevitably becoming upset when that illusion is swiftly crushed by the other person stopping responding. Establish that you’ve enough in common to see if you click in real life over a drink and then arrange to meet within a few days or a week or so.