I started working on such a project. Unfortunately, I haven't gotten further than laying out the user interface in SWIFT. It got set to the side for the time being.
Also Apple charges around $100 year just to have access to designing code. It has to be done on an iOS or MAC device. They charge to publish apps and generally like to charge for each download though I think if it's published for free use that might be gotten around.

Eventually my goal was an open access iOS NTRIP app to work similar to Lance's app on Android.
iOS has some peculiarities. Devices wanting to use the BlueTooth will need to be BTLE v5 or newer or will have to run a Apple secure wifi adapter inside. There is no iOS BT Serial Port Protocol (SPP) like Android and Windows allow.
It may be a while before I pick it up again. I haven't even charged my Macbook battery since last winter.