Ok end turn being on the right and the hero power on the right… that’s accurate? But doesnt make it any harder for a left handed person, or just using one hand to play any more difficult tho. The phone is flat on a surface, or your lap, or in some holster, raise your hand of choice and index finger, play game as normal. Being left handed and the end turn button being on the right doesnt make it any harder on a lefty when you are literally hovering your hand of choice directly above the screen and can reach all of its surface with the smallest changes of just your finger angle, possibly even the more microscopic change of your wrist angle… but given the phone is directly ahead of you in the center and neither hand is needed to hold the phone itself, there isnt any issue there.
Are you people holding your phone AND trying to operate the screen with the same hand? (like one might answer their phone this way) If so, thats a problem that was invented that didnt actually exist… the end turn button being about 1.5" to 2" the right half of the screen is about the distance your index finger ought to be able to extend in that direction…
So far I am absolutely not convinced outside of the rare case of some accessibility reasons such as someone with some hand issues or any other condition that there is any issue here, or even any minor inconvenience either. The normal operation of using no hands to hold the phone and just operating the device like normal by hovering the hand or your choice over the screen and just press and dragging as needed seems to be the obvious and intuitive way to play HS on a phone. If on some massive tablet, all the more reason to not be holding the device and having it flat in front of you, on lap, in some variety of holding options.
For a long time now I have been using one of those around the neck holders for my phone when playing HS, I normally only ever see them for sale around xmas time for whatever reason, but they are typically depicted as letting a person watch movies or any media really, comfortably and hands free, which is super helpful while in a vehicle or on a flight/train etc. I keep it extended to about where my sternum and belly border each other and I can one hand play the game with either hand I want to.
https://i5.walmartimages.com/asr/15aae865-50d2-4fd5-bdd5-6867ce5043f0.be024c254c440a4d336b3db39c476d9e.jpeg?odnHeight=580&odnWidth=580&odnBg=FFFFFF
https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fcdn.shopify.com%2Fs%2Ffiles%2F1%2F0664%2F2322%2F6583%2Fproducts%2F51NFyTBljRL._AC_UF1000_1000_QL80_FMwebp_1200x1200.jpg%3Fv%3D1677470379&f=1&nofb=1&ipt=220d0dd614fdcf88b5225f54c0d39c961d747c21adb7532baf8c0439d62b21b8&ipo=images
Ok those links are hella long.
https://tinyurl.com/25kus9as
https://tinyurl.com/3vhc9283
But this is my defacto method of playing on my mobile for the last 4 or 5 years now.
after a bit I modified mine to just be a magnetic holster instead of the clamp grip style. so much better lol.