Geez. What’s it with providers “selecting” what features are best for people? This is a huge let-down by micro.blog. The standard on Likes is well defined and used by many peoples and platforms. The beauty about Webmentions is _that_ the user has the choice what to do with them (and how). Not supporting this officially for a higher cause as a provider is highly opinionated (read BS). And since it’s just HTML you can do it anyway if you’re willing to jump the hoops.
You _could_ e.g. redefine your Webmention endpoint, and use another one. Self hosted or e.g. from webmention.io – may be a pain in the neck to integrate on a foreign platform though.
( And while on it could connect to backfeeding services like brid.gy 🙂