I bought some practical plastic containers that are the right size for yogurt, fruit and granola. The containers have a separate section at the top for granola, and I put the fruit in first and cover it with Greek yogurt. Usually, I'll make a fruit compote by heating a bag of frozen fruit and maybe a little bit of sugar.
Sandwiches freeze well too. Then you can just take them out of the freezer the night before. You'd have to experiment a bit with the fillings and the bread.
What about a smoothie? Takes about 30 seconds to make. Put Greek yogurt and milk in a smoothie container (and protein powder, or peanut butter etc). Add a handful of frozen fruit, fresh fruit, greens etc just before you blend.
Soup for lunch? I make my own and freeze it in single portions. I usually have a few soups on rotation, so I don't have to look up the recipes. Make them in the Instant Pot, so you just throw the ingredients in, switch on, then blend and portion. Take the portions out the night before to defrost, heat in microwave and put in a flask.