Yes. Two separate intent to marry letters that were signed. My RFE acknowledged they received signed intent to marry letters.
However, they state that wasn't enough and asked for proof with plans, engagement ring, and etc. that I mentioned.
I know the VJ forum is still stuck in the pre-2020 ideas all is needed is the two VJ intent to marry template letters signed.
I noticed there has been more posts talking about the intent to marry requiring more proof:
Chinese WeChat has been discussing this also. A lot of people now have to submit engagement ring photos, description of plans, WeChat logs, and etc.
Not sure. Perhaps it depends on the country where the fiancé is at?