iPhone + iPad shared data plan?

I have an iPhone 6S and an iPad Pro cellular. My iPhone is using a Bell tablet data plan—around $42/mo for 5 GB, and my iPad doesn't have a SIM card yet. I use voip.ms for calls/text and do everything over data.

I plan on getting a new iPhone this fall, and am considering to get my iPad online without tethering. Any recommendations for iPhone + iPad shared data plans? I need lots of data but minimal (or zero) voice + text.

Browsing carrier websites so far leads me to believe they only offer data plans that are shared with a voice + data plan. I want data + data, or a multiple SIM cards sharing one bucket of data (no voice). Does this even exist? I'm in Alberta.

Thanks!