The TOTP feature in Bitwarden works, if you paste in the whole otpauth:// URI to Bitwarden's Authenticator Key (TOTP) field. The URL specifies that the hashing algorithm should be SHA256. If you just import the secret= value into Authy, it probably defaults to using the SHA-1 algorithm, which may be why the codes generated by Authy don't work.
SHA256 is more secure than SHA-1, which I guess is why Lemmy has chosen to use it for its 2FA feature.
I have had some issues with Robert Oster inks and hard starts. In particular, they don't work well in my Lamy 2000 fine nib and Pilot Prera medium nib pens, whereas a Pilot Iroshizuku ink I bought recently seems to flow a lot better. It's a shame, because I do like the colours; I might try them in my Kaweco sport pen (which has a wetter medium nib) and see if they flow better.