I also used a 6s for years and years. Has a great form factor. I bought a 2nd hand Mate 20 Pro from a friend as replacement. It has a much larger, AMOLED screen

I also used a 6s for years and years. Has a great form factor. I bought a 2nd hand Mate 20 Pro from a friend as replacement. It has a much larger, AMOLED screen, bigger battery, faster charging and better cameras. So many features! A refurbished iPhone x or similar may surprise you and they're not too expensive