From the website:

Giving users their seed phrase is not enough.

While great advances have been made in interoperability and recoverability, developers across the industry continue to build wallets that either:

• Don’t implement BIP standard(s).
• Implement a BIP standard, but inconsistently when compared with other wallets.
• Implement a BIP standard, but one that has not been widely adopted (and perhaps only by them).
• Don’t have clear documentation about their derivation paths, backup and recovery processes.

This chart is meant to gather information about wallet defaults for external recovery. Wallets come and go, information gets lost, and users are left with tears. Responsible wallet developers document external recovery. Users should not have to dig through the source code to figure out the Derivation Paths or Redeem Scripts.

https://walletsrecovery.org