I once told one of the big dogs around this place "If you can make it inheritable you will corner the market."
I'm in my 70th lap around the sun, so I probably think of this stuff more than most people here.
I have an envelope stashed for my brother. It has a paper copy of the needed passwords and keys for anything crypto. It also contains the key that I use to code all my other passwords.
One other thing. I often use push notification on appropriate accounts. He has a fingerprint lodged in my phone so he can use it, too.
I realize that you and I have different situations. My brother can be here within 24 hours of the time I assume room temperature. (personal slang for cark).
Sounds to me like you have a fine idea for securing your future AND Taraz can let small steps accessorize the dog's wardrobe with the tags. One at a time, of course, for security reasons....
You've got a good plan and glad to hear it.
My plan will get more sophisticated as the need arises I guess but realistically it will do what it needs to as it is. It's also a good way to double up my seed-back up in the advent of losing my Trezor (and my seed phrase). T-dog (no one calls him that) will have his copy for me. I reckon it's a reasonable plan. Maybe not as cutting-edge as some...But it'll work.