MS 365 Business Premium and W10 extended security licensing

Good morning,

I've 2 remote workers with Windows 10 laptops I'd like to get onto the Extended Security Updates as managed devices. I've been advised to use 'Volume Licensing' via my admin portal, but this isn't present as described and wonder if this is because we're only on 365 Business Premium as a small company with 5 report workers.

Can anyone direct how to acquire the licences and apply to my 2 remaining W10 machines, preferably remotely, via InTune for example.

Regards,

Rich