Correct. The sending part simply involves Alice deriving a pubkey for Bob, a cryptographic operation with minimal elements. However, detecting silent payments requires scanning the blockchain to identify payments made to you, which means you need a Bitcoin node. The challenge is implementing this receiving functionality in a light wallet like Wasabi while preserving privacy. Fortunately, this is possible using block filters—a technology Wasabi implemented even before BIP158 was finalized. In other words: yes, the receiving part requires more work. 

 Are not block filters used for neutrino btc nodes? 

 Yes but we developed our filters before it was standarized as bip158, that's why our filters are not compatible.