Thanks for exposing this potential red flags with those projects that you mentioned, Even me I also notice that most of the so-called new Defi projects have used the same name or just fork from the existing platform particularly the name Yearn, the most common name in the new Defi projects, Aside from that project team is anonymous, no whitepaper no roadmap and many more, for me that was quite suspicious so it's better to avoid that projects for the sake of your own funds.
Scammers often try to pass themselves off as another project or at least show that they are somehow connected with this project. This is especially common with the popularity of the decentralized exchange Uniswap, where some people choose coins by name and do not look at smart contracts. If you choose coins for trading in this way, you can confuse a real coin with a fake from scammers.