There is a SLIP39 tool here for turning a seed number in to m-of-n phrases: https://iancoleman.io/slip39/
And there is also a tool here for turning a phrase in to m-of-n phrases: https://iancoleman.io/shamir39/
However, as with the Shamir's Secret Sharing tool linked above, there are no standard implementations, and so if you cannot access Ian Coleman's site for any reason, then your shares become next to useless.

A better option might be to store your seed and passphrase entirely separately. If you were to choose a passphrase of 40 characters, randomly selected from the ASCII printable character set (95 characters), then it would be 262 bits of entropy, which is more than your seed phrase at 256 bits. As with the seed phrase, you would write this down on paper and not try to remember it. Provided you set this up in a secure fashion, if you store your seed and your passphrase separately, then any attacker finding only one can do absolutely nothing without either finding the other.