I use an iphone 12 too. I just bought these https://www.amazon.com/dp/B07ZKNMKD7?ref=ppx_yo2ov_dt_b_product_details&th=1

which are similar to the ones in your first link. But yeah, idk if these are for me, but I don't think I can handle the strain on my finger joints with 4 fingers (I have joint pain problems). I'm having trouble with mobility and scoping with triggers, and I hope it's just an adjustment period.

thanks for sharing your experience!