You're better off using Mullvad directly--it looks like they don't require you to fork over personal information to use their service.
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Because most peoples threat model doesn't include actors that can force a VPN provider to give up their data. They just use it because it's making it easier to not get data stolen in a coffee shop and watch US Netflix.
If there's a new provider out with no name, company address, audits or history and tells me they are not sharing personal information I just have to take their word for it. So it's not much better than the alternative if I can't verify it.
Compare this to your ISP and telecom providers. A subset of the larger providers willingly handed over the communication metadata of their users without warrant.