Hi,
The README for Soldered-Inkplate-ESPHome lists full_update_every as a configuration option. After some testing and scrolling thru the inkplate.cpp it seems like the option full_update_every is not fully implemented. There are variables for full_update_every_ and update_count_ in the inkplate.cpp but they are never checked to trigger a full update as far as I can see.
I noticed that too while I was looking at the code the other day and fixed it but forgot to push to Git. It should be working now.