Apple doesn’t have an add-on “coffee shop” VPN product preference here AFAIK, and the immediate path you’re on here is too often filled with sketchy-looking vendors and rife with opportunities for privacy problems and data and metadata reselling. Yes, the privacy product you are asking about is itself too often a privacy problem.
I wouldn’t generally use and wouldn’t generally suggest a “coffee shop” VPN, irrespective of the amount of hype involved. Not outside of uses for geo-shifting for website testing or CDN testing or such, maybe.
What options do you have, then? One very nice option and this for various reasons, and one involving incrementally upgrading your own networking gear into your own Ubiquiti Unifi networking gear, would involve acquiring a Ubiquiti travel router.
There are other travel router options available, including options from GL.iNet and other vendors.
The advantages of travel routers and your own Unifi network gear (and similar gear offerings from select other non-hosted Wi-Fi vendors) is that you control the gear and the servers and the logs, and you also gain remote access into your own network, and the routing happens via your own network and not some other server and other network.
Here is a NAS Compares video review of the Unifi travel router and GL.iNet travel router, to get you started in how the pieces fit together: https://www.youtube.com/watch?v=QVID4cM5KFg
For lower-budget approaches for adding a a second and partial tunnel around your existing end-to-end encrypted connections, consider the Algo VPN client and your own hosted VPN server.
The lowest-budget approach is the existing end-to-end tunneling with iCloud+ Private Relay, and you probably already have this available.
If you’re in the US and are considering your own networking gear, there is an import ban on new consumer router designs recently promulgated, and how that import ban will work is not yet entirely clear. Existing imported router designs and new router designs originating from within the US can be FCC-approved and then sold, but things here are going to be “interesting” for a while.
Got questions? Ask.