My suggestion
To fill up and keep energy reserves longer look for protein sources in with each meal.
Meat isn't the only protein, so see what else suits you. You need more than just the protein in the meal as well. Load up on many different vegetables.
Some 'breads' are better than others so experiment. Do you have table of contents % on the label? I find the higher the protein % the better.
Just looked at my bread label. Protein is 6.6%.
I find ones with seeds keep me going longer, on days I have bread or toast, if you can tolerate seed mixes in bread. Then I also add protein to the filling.
It really is an experiment to notice what you eat and how long before you need to 'refuel'. If the test for success repeats a few times you are on a winner.
Since I've been busier I've had a plate of cheese and crackers at afternoon tea. Yesterday I wrapped them in lettuce.
I'm still struggling to get onto the evening meal more quickly.
I'm sometimes mixing up my walking route by walking up the hills near my house, though not the super steep sections until I feel more fit.