I need a little fewer apps, but yes. It's not really a question about what operating system I want, there's currently only two supported by at least two or three of the apps I need. An I only trust one of the companies behind those two operating systems.
Personally I don't really care if there's a browser, email, any messaging beyond SMS, maps are nice to have, but not required. I can even do without banking, but I do have a few special apps for work and interacting with the government.
Depending on where you live, we reached a point where you can choose to not have a SmartPhone, but good luck interacting with society, every new thing is "App first". I a few weeks we'll have Covid-19 passports, on our phones. Don't have a smartphone? I would count on the government having planned for that scenario.
Every country is different, especially USA vs EU vs other parts of the world.
I could do without banking on my phone but most bank sites in my EU country are sending a message to their banking app on the phone to do 2FA when we login. This started between fall 2019 and early 2020. One of the banks I use is still supporting a hardware token (one of those displaying random digits), the other ones are all app based. 2FA works by entering a PIN in the app or using the fingerprint reader. I wouldn't be able to do any banking without an Android or iOS device.
WhatsApp (not the web app, it's limited)
Skype and Meet (the Linux desktop versions would probably work but I wonder what their UX would be on a small screen)
Banking apps
Maps with satellite and street view
Location tracking / following tracks (in using OsmAnd for that)
Email (Thunderbird on a small screen?)
My country 2FA / digital signature app
A keyboard that does swype well
Then it should be small, let's say 14 cm tall (which used to be huge, oops) less than 1 cm thick, nearly no bezel, 130 g of weight.
There is no Linux phone with those specifications AFAIK. So yes, I want a Linux phone but I don't think I'll buy one in the near future.