Create Light Group in Lovelace

I have two colour lights configured in Lovelace - I would light to create a group but I’m temporarily with no access to a computer or tablet, so it’s not an easy task to edit the Yaml within my DSM/Docker/HA, in my phone.

Quick question - is there a way to do it on Lovelace?

What I want is turn on/off and change the colours of both lights at the same time.

Thank you.

Cant create groups in Lovelace but should be able to create a simple light group via file editor