does 24-word recovery seed recover just bitcoins or all coins?
Yes, you will have access to all of your cryptocurrencies.
The 24 words seed is used to derive the master key. Keys for all cryptocurrencies are derived using BIP32 and BIP44.
You can check out the BIP44 Mapping Table.  

The 24 words seed can be used on BIP39 compliant wallet like Electrum.
The private keys can also be accessed with BIP39 Tool GitHub or the online version (I don't recommend using it online.)