Newbie here, please be gentle.

Should I worry that the majority of my site is not listed as a valid Mobile usable page in GSC ? Currently we have 210 valid pages when i check Coverage, but looking in "Mobile Usability", only 36 are valid.
I can't understand the 36 valid part, since many are nearly identical. This page for example is "Mobile usable":
https://marketwise.co.uk/science-mailin ... mail-lists
There are many similar pages, built from a template (I can't list a second example to share one unfortunately) and none of them are listed as Mobile Usable - Valid.
Should I worry, I know Google prefers Mobile friendly sites, so I want to make sure all are listed as valid.
Thanks for any help and advice.

Maria