There are lots of different licensing vehicles that include Intune rights including those you posted a screenshot of. You should contact your account team or a licensing reseller for further options.
I can't find a separate one for MDM anywhere
MDM is the main functionality of Intune and they are inseparable from each other so not sure what you are asking here.
Don't confuse Microsoft 365 (M365) with Office 365 (O365) -- these are not the same. M365 is a super set of and thus includes O365, but M365 contains much more than O365 including MEM. O365 only includes the products formerly known as Office though (like Word, Excel, Outlook, etc. and are now known as Microsoft 365 apps) and not Intune or MEM.