@dikaioumenoi I'm at 1400 cal and 130-140g temporarily, so I supplement a lot, but it's not long-term. I'm also vegetarian so I don't eat any meat at all.
I was going to suggest the Fairlife 42g shakes, but it sounds like you already do those.
Premier Protein has some pretty good premade shakes for 30g at 160 cal.
I recently found Legendary Foods, which makes "pop tarts" and sweet rolls with 20g between 180-230 cal. They're not the same texture as real poptarts, but I really like them.
I also like Kodiak Cakes waffle mix and oatmeal packets. I add egg and soy milk to the waffle mix instead of water and you have a pancakes or waffles with 20g protein.
I make protein shakes with ghost vegan protein powder, plain greek yogurt, soy milk, and a half scoop of plain pea protein that are 61g protein and just under 400 cal(meal replacement). You could probably get a higher protein count with whey powders, but they upset my stomach so I don't use them.
I try to replace this with higher protein versions, like instead of tortillas, I use egg wraps or the Folio cheese wraps, but they're a bit high for calories. I use Banza chickpea pasta instead of the regular kind. I also like Beyond jerky and Twin Peaks protein puffs as a snack when I'm looking for something salty.
I hope some of that is helpful.