Can I connect 2 monitor with USB-C Digital AV Multiport Adapter.

Then you should have your answer via the link I provided you. The USB-C Digital AV Multiport Adapter would not work as it can only support connecting to a single display by HDMI. The USB-C port on this adapter is for charging devices.

You would need to connect each monitor to a separate Thunderbolt 3/USB-C port with the appropriate adapter for each monitor.

Ref: https://support.apple.com/kb/SP799?viewlocale=en_US&locale=en_US

Video Support

Simultaneously supports full native resolution on the built-in display at millions of colors and:

• One display with 5120-by-2880 resolution at 60Hz at over a billion colors
• Up to two displays with 4096-by-2304 resolution at 60Hz at millions of colors
• Up to two displays with 3840-by-2160 resolution at 60Hz at over a billion colors

Thunderbolt 3 digital video output

• Native DisplayPort output over USB‑C
• VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately)

Which exact model is your MacBook Pro? Depending on which you have, you should be able to find the answer by going to Apple Support's Technical Specifications and look under the "Video Support" section for your particular model.

What display INPUTs are provided by your displays? or what make&model and these can be looked up?

Best results are obtained by using thunderBolt-3 or thunderbolt-2, or DisplayPort family, if available, but Apple does not sell all the possible cables/adapters you may need for all options.

You must make the conversion from Computer output to display Input is at most ONE adapter -- "stacking" adapters almost never works out.