Arduino expansion board for MKR/Portenta

Hello,

I am working on a project using Arduino Due (moving from Arduino Mega 2560) with a lot of sensors, pretty much all analogs and a lot of digital pins are used.
Basically I reading temperature sensors, GPS, current, voltages and more, so I have currently 25 sensors but I could add more if needed.
I also have an Arduino Yun to pass all the data to a mobile phone which reads the data over WiFi.

I was wondering if the MKR or the new Portenta have an expansion board/shield to fit my use case of tens of sensors, any idea?

I like the more computing power and form factor of these newer boards which I can benefit from.

thx