Why not something akin to "fixed-offset cursor"? Actual cursor/pointer is always a centimeter above the finger position (thus always visible [bottom of the screen to be handled as a special case]), and finger movements manipulate position, while hold duration accesses alternate modes.
For a somewhat similar implementation (touchscreen is essentially handled as touchpad) look at how Teamviewer handles remote sessions to Windows desktop from smartphones.
I would really like any/all of those as a toggle-on mode for use on Android itself... selecting text with arthritis fingers is a pain – literally and figuratively.
Not an answer to your question, but a vent-rant:
95% of anti-Musk "jabs" are reality and facts, and way over-shouted by Musk's fanatics, butt-kissers, and followers of his cult of personality. I have personally tried to set record straight with multiple instances of people in my private life (with legal documents, news clippings, timelines...) – nothing helps, they always find an excuse for him, it's like a bloody religion. And I'm sick of uncritical and butt-kissing media coverage, his fan club, and his egomaniacal loud existence.
It has always struck me that the people expressing the same sentiment that you just did put far more energy into it than the "fanatics, butt-kissers, and followers of his cult of personality"; to the point that you'd bother the "people in my private life (with legal documents, news clippings, timelines...)". It reminds me of the tech journalists who declared bitcoin dead in 2013, and how they'd get more venomous in their attacks year after year, presumably due to some kind deranged ego shielding.
In complete agreement with above; same source. Ever since he became a president, he's been spewing crap everywhere, and daily spats with/at prime minister (who's a special kind of "tool" , of course) or whoever would be the flavour of the day, are essentially "his normal" now.
If you are ever to pursue such a project, please pay close attention to proper electronic circuit design and safeguards when it comes to relays. Otherwise, you risk burning out the controlling pins or the whole system, due to reverse voltage (measured in hundreds) that is generated by the relay's coil when the relay is turned off.
The easiest approach is to just use a commonly available relay modules used with Arduino or similar platforms/microcontrollers, as they already contain minimum or all protection mechanisms. So, the module will contain the reversed diode in parallel with the relay, while additional transistor and optocoupler will allow you a complete galvanic isolation of the controlling- from the and relay circuit.
YouTube has plenty of user-friendly resources with schematics and functional overviews, just search for "relay module" or "relay arduino".
Get IKEA's LADDA rechargeable NiMH, they are a rebrand of Eneloops, the some of the highest quality NiMH batteries available, and are made in Japan; all tests on YouTube and elsewhere consistently put them at the top of the line.
They have very low self-dishcharge rate (and even come precharged in packaging) and with recharge cycles ranging from 500 (for the highest capacity 2450 mAh AA ones) to up to 1000 (for 750 mAh AA/1900 mAh AAA ones). Also, they do not leak.
Oh my FSM! This brings some very, very early, and almost forgotten memories! Of fiddling with limited demo version of this, and it seeming so magical to my kid's eyes way back then... :)
