Most do. Source: I usually use passwords that long.

Maybe 1 in 10 don't, and I find that annoying since 32 characters containing only lowercase real words and spaces has several times as much entropy as 8 characters of random mixed case letters, numbers, and symbols.

I default to using 128 characters because that's the max for the password generator I use. A surprising amount of accounts are OK with that, like more often than not. I have pared accounts down massively since using a password manager though, and use privacy respecting services when possible, so I may be self selecting here.

the vast majority of mine are +50 characters - you are just wrong. the services which strictly limit the length are rare and their security is suspect since they should be hashing your input anyway

Limiting password length is a red flag they are storing your password in plaintext. I'd be wary of using any service like that