They shall work fine with Unity Remote.
Yeah, and that is just horrible. You can't design a game where you have to go to your external device every time you hit play (that is if you have a device to test on in the first place).
In 2021 we need touch actions that do not rely on external devices for the production of your mobile games. Anything else is just - excuse the bad expression - crap. This should have been implemented like 5 years ago natively into Playmaker. Huge opportunity missed here imho. And I'm sure many potential customers lost.
Tbh, everyone who suggest to use Unity Remote, probably never has designed a mobile game. And if you have, then you don't know what you miss with designing your game and test-playing directly in the editor.
Look at Lean Touch+. Imagine all those touch inputs wouldn't work in the editor. Or look at the competition like Buildbox. This is how it needs to be done. Without any workarounds and no distractions for your game design.
Anyways, I already told this directly to Alex couple of months back, so not going to continue that negative spread. It's just something I can't understand at all and it hopefully is being taken care of since the mobile market is nowadays by far the biggest market for games.