For reading news, I recommend getting a tablet and a case with a stand to prop it up at a comfortable reading angle. It's easier to read with aging eyes than a smartphone. It will still have the accidental long press problem, but icons need to be dragged a longer distance to be rearranged so there is a better chance it will snap back into the right spot after an accidental long press. Someone needs to make an elderly-proof launcher that has a way to lock things in place on the home screen and disable that long press there. Maybe someone already has? I haven't played with alternative launchers in years.

I use Blokada 5 on my android phone which is a free, phone-wide ad blocker that runs as a local VPN based DNS service that blocks spam address DNS requests. They do have a newer version, 6, that's cloud based instead of a local VPN and requires a subscription and I haven't tried that out. Maybe that one is easier to reconfigure remotely if something important inadvertently gets blocked. The only reason I never tried it is I have a very limited income right now as a full-time caregiver. I have used Blokada 4 and then 5 for several years now.

My pi-hole on my home network is also pretty set it and forget it and protects all of my mother-in-law's devices while she is connected to the Wi-Fi, which is most of the time since she only ever wants to leave the house for doctor's appointments or occasionally to eat out. I bought a cheap orange pi zero to set the pi-hole up on and it lives next to the router. My MIL is a 70+ year old gamer so she is a little bit more tech savvy than your average elderly person, but she constantly falls for ads and terrible tabloid clickbait that shows up in her news app.

I kind of want to try setting up an RSS app for her with more curated news sources and see if that will give her a satisfactory news feed without all the junk. I used to use Google News, but it has become nothing but spammy tabloid links with no relevance to me. I mostly got my news through Reddit in recent years, but Lemmy reintroduced me to RSS and I've been working on collecting good news sources like back in the good old days before the social media firehose of info.

Unfortunately (for the purpose of offering advice), I have no experience with remote tech support. My dad is a retired computer engineer so he's got a handle on things at his place. I live with the tech-challenged person in my family.