Good diet inclusions

Breakfast

1 scoop protein powder, 1 scoop meal replacement in cold water: ~225cal

multivitamin, b100, calcium magnesium, probiotic: negligible

lunch

1 or 2 bananas: ~100cal each

homemade granola bar: ~150cal

2 mini cucumbers: ~15cal for both

dinner:

1 can of tuna with siracha or tai chili for flavour: ~200cal

Weekends are my "cheat" days, reasonable but still easily sub 2k cal (I had a box of mac n cheese, 2 cans of tuna and ~750g of salmon today). I started monday at 121kg, and I am currently at 116kg (or my scale is broke). I do stationary bike for 15ish min in the morning, and work is not intense. I get plenty of protein (tuna and breakfast gets me about 60g alone), but is there anything that would be good to add? More veg/fruit/fiber/etc? No allergies that I know of.