Low carb scotch eggs, made the days or so before needed, and possibly frozen as a batch or kept in the fridge?
https://stepawayfromthecarbs.com/low-carb-scotch-eggs/
Pigs in blankets? cocktail sausages? kedgeree with cauli rice? asparagus wrapped in ham slices? chicken wings? Our Friday farmers market sells pork crackling and pork scratchings. With a bit of planning and a modicum of home cooking, you can ring the changes effectively. The berries + yoghurt is one that many here use instead of cereal
I would suggest a Victorian cookery book is a source of ideas, since the staff prepared the breakfast the night before and did a cold buffet in the morning even in the posh houses and guest houses And this was in the days before fridges and freezers. Anybody remember 'Futtocks End'?
Last but not least, although not a keto LC source, I find Aldi carries some single portion ready meals that just need a quick warmup in a microwave that might appeal? I use them sometimes and they do not freak my sugar levels out, but test with a meter to see if suitable for you. Take about 5 mins from chilled, and the advantage is that they are ccooked and eaten from the included tray that saves washing up after