Here we go again...

I think there's a decent chance that your new exercise routine has created some extra water retention (for muscle repair), and that's masking fat loss on the scale temporarily.

If you're exhausted and hungry, it's not a good plan to cut calories further. Just wait it out. (I know that's hard!)

I even think you might be over-doing/over-restricting.

The sweet spot for exercise is to be doing enough that you feel a little challenged during the workout, but energized for the rest of your day (after maybe just a few minutes of "whew!" feeling right after the exercise). Then, as you get fitter, you can gradually add more duration/intensity/frequency to keep a bit of a challenge.

It's super common to feel like we need to restrict and exercise to extremes in order to lose weight, but in reality that can be a recipe for burnout and giving up. Better, IMO, to gradually change habits in manageable ways, in a healthier, sustainable direction. It took us a while to gain the weight; realistically, losing it (and getting fitter) is going to be a long-term proposition, too. That means we need to find a routine we can stick to, and build on.

We all want the weight off now, but over-restricting/over-exercising can be counterproductive, in two ways. First, as I mentioned, it makes it hard to stick with long enough, and easy to give up quickly. Besides that, the excess exercise and low intake can make us feel fatigued and exhausted, causing us to rest more and do less in everyday life (chores, job, non-exercise hobbies), so wipe out some of the calorie benefits by spending more time in daily life resting/sleeping.

If you're eating a well-logged 1700-1900 calories, it's almost certainly the case that you're losing fat. I'm a 5'5" li'l ol' lady (age 64), weight in mid-130s pounds (formerly obese for 30+ years!), sedentary outside of intentional exercise. I still lose weight on 1800 calories plus exercise. I admit, I'm mysteriously a good li'l ol' calorie burner, but since you're younger, taller, currently heavier, and much more active, you should be fine at 1700-1900, and quite possibly more.

Scale weight is not just fat, but also water fluctuations (part of how a healthy body works!), and temporary digestive system contents in transit. Those latter two things aren't fat, but they'll obscure fat loss on the scale, especially early on in a new exercise routine.

This is a good thing to read, in these circumstances: https://physiqonomics.com/the-weird-and-highly-annoying-world-of-scale-weight-and-fluctuations

Hang in there, with a manageable approach and patience, you can do this!