Can I force iPhone pro 13 to use cellular data while connected to a Wi-Fi network?

Yes, we are using internet provided via cellular service. Unfortunately at this time the only option is not unlimited data. So I was trying to see if I could save data by using the unlimited cellular data for some phone streaming and reserving the 2GB/$1 for desktop/laptop only.

I’ve tried setting up a local network that is not connected to the internet to connect to my local devices however the phone tries to use that network to receive data and therefore I get no internet connection and can stream nothing. WiFi assist only kicks in when WiFi signal is weak not when there is no connection to internet.

I’m not sure the complexities involved

in creating a path for simultaneous local network connection with the choice to receive data via cellular data, but it seems like it would be a good feature that would allow flexibility for users who are in remote areas who need to use their technology in creative ways to achieve desired results.

Thank you.

so there is no way to simultaneously download from cellular data and connect to devices on my local network?