I'm with you, I use Pocket all the time on my Kobo as well - I need to cobble together some self-hosted alternative. Did you find another alternative besides Omnivore?

I still use the self-hosted version of Omnivore - I had built quite a lot around it so when that shut down I just decided to transfer over.

It was hard enough going from Pocket to something else, I didn't want to do that again.

I actually have a Supernote now, and side-loaded the Omnivore App onto it - so I use my Kobo less (though still somewhat at night due to the backlight.)