Don't use localization or weather apps, don't use soft or services from big (US) corporations, don't use discount or banking apps in your mobile, use a good VPN/SPN or Snowflake, use Pi-Hole or better Portmaster on desktop, InVizible Pro on Mobile, don't store sensible data on your Mobile....the most important, use your common sense, PEBCAK

You have taken a lot of useful steps. May I suggest email aliases? Using same email address on many services is too easy to track

Use cash. A card payment allows your bank and the shop to track you.

I wouldn’t worry about moving away from the apple devices. Just turn on lockdown and keep it on, do the privacy checkup or whatever it’s called and use a doh profile.

On the other hand, which is to say stuff you should be doing to enhance your privacy, stop voting. Assuming you’re in the us, voter rolls with your home address are free for any advocacy group to peruse. Consider moving your home under a trust or something so that your property taxes are not tied to your name. If you rent, stop renting, if you can’t, consider renting a place from your local credit union instead of from a company. Banks have more chance to protect your privacy than a rental company will r an individual.

The best way?

Get rid of all the connected stuff entirely, delete all your online accounts, get rid of your cell phone and similar devices, start paying cash for everything. Close your bank accounts and keep your money under your mattress. Move into the woods, grow your own food, and don't talk to anyone.

You are still exposed by using Apple products. Use linux for PC's with encryption, vpn. For a phone, switch to device, such as a Google Pixel, or several other manufacturers that can use a privacy android rom. I use CalyxOS, private, secure and de-googled.

Lets not forget...operation PRISM which was exposed by Snowden.

The measures you’ve taken are more than enough for your threat model. I think it now depends on your data hygiene. Weakest link kinda thing, where it doesn’t matter if your home network is locked down and you use privacy friendly services if you’re careless with your data anyway; which I assume you aren’t.

You might enjoy reading Extreme Privacy by Michael Bazzell

https://www.goodreads.com/book/show/217289412

Removing anti-libre software, like WhatsApp, Instagram and iOS, from your friend's devices.

You pretty much got the foundational stuff plus a little more established. Aside from getting away from Apple, which you already mentioned, there's not much more I can think of without going full tinfoil hat. The main thing, in my opinion, is just not being a wide open door and giving away your personal data freely. Sounds like you're there, so long as you don't have social media accounts.

There is a lot, and there are a lot of levels. I am working on this now as well. Escalating from where I was, its a learning process. Too much to type in a single comment/response.

If you would like more info on removing your info from the internet, reducing the amount of spyware on your android phone, de-googling yourself, or limiting how much info you spill while you browse, we can connect and I can share what I have been doing. Ive got plenty I still need to do beyond this, but I am happy to share my lessons learned as it were.

How do you firewall specific devices with OpenWRT? That's something I'm about to start attempting myself.