Focus about the quality of your diet first, quantity second. Your baby's brain is developing until the very last day in your uterus and even after birth, so your diet matters.
You are eating a lot of processed and industrial baked goods, the granola in the morning , the thin bagel, the pizza, the rice cake, the hula hoops, ....
The calories might be low, but so is the quality of what you and baby are eating.
Do not underestimate the incredible work your body is doing for two. You are also developing the microbiome your child will go through and what you eat will determine the species and be the foundation of his health.
Focus on adding, so if you like yoghurt and berries for the morning, great, then add 1 or 2 tablespoons of grounded flaxseeds (rich in ALA one of the 3 Omega 3s) and opt for rolled oats.
For lunch, if you can, try to have processed meat only once a week, and depending where you eat, at work or home, opt for salads (homemade chickpea salad, pasta salad, nicoise, caesar, ...) or soup with beans such as minestrone, lentil soup, ...
For dinner, think salmon filet for the EPA and DHA, a steak, or a chicken breast, a stew, a pasta , brown or black rice, cauliflower steak,
Hummus is great, try to make your own, for less additives and more nutrition and have way more veggies with it. Carrot, fennel, cucumber, celery, red pepper, ...
You can have eggs either with your salad (a boiled egg) or as a dish.If you need an evening snack, take a plate with an apple, pear, some cut melon, watermelon.
Opt for the whole product, so whole milk, whole mayo, and maybe try to make your own tahini dressing as an alternative to mayo,
Plan your meals around vegetables, try to have some fish at least twice a week, some pulses, be it lentils, beans (this recipe is really nice www.theguardian.com/food/2022/aug/27/vegan-celery-saffron-white-bean-stew-recipe-meera-sodha but cut the celery smaller) , chickpeas... there are so many variations of hummus with beetroot, eggplant, ....at least 3 times a week (out of the 21 meals), yes to meat, but not processed unless you make your own burgers . You can use chickpea flour to make a tasty flatbread called socca, or falafel, veggie burgers, ...
Get the habit of eating well, less processed, and you will pass that habit when the time will come to wean your baby. There is so much great food, great recipes, pleasure out there, why waste it on crap.
Your skin will be more elastic, you will be able to control weight, be satisfied, and bounce back to your pre-pregnancy weight.
You deserve some sweetness, or you will crash and hit the cupboard in the middle of the night. And it is ok, but have good quality dark chocolate , a small piece of the Sunday cake.
You have another child, this all great food for her/him as well.