Does BIP-174 (PSBT v0) enable creating and serializing a PSBT with no inputs and a number of outputs?

I’m making an attempt to know whether or not BIP-174 (PSBT v0) helps making a PSBT that originally has no inputs however comprises a number of outputs.

The meant stream is:

1. Individual A creates a PSBT with no inputs however with a number of outputs (for instance, a cost request).

2. Individual A serializes it to Base64 and sends it to Individual B.

3. Individual B deserializes it, provides their very own inputs (and probably a change output), indicators it, and broadcasts the ultimate transaction.

Nevertheless, after I do this utilizing bitcoinjs-lib (challenge), deserialization fails as a result of the PSBT has no inputs.

My questions are:

1. Does BIP-174 (PSBT v0) formally enable a PSBT with zero inputs?
2. If not, is there any supported option to obtain this “outputs-only → add
   inputs later” workflow below PSBT v0?
3. Is BIP-370 (PSBT v2) required for this type of multi-party building?