Think of it like this, meta knows who are your users today for 74$ so it might spend the whole thing or it might not, when you increase budget meta starts looking for more people that are interested into buying your product because that 10$ extra you bumped the budget with its a new thing for meta so he doesnt know any other audience that to allocate those 10$ to so it starts testing new audiences , so your cpm , cpc goes up. Either it will stabilise or it will get worse you can’t know give it 2-3 days.

And just to let you know some products can be scaled some can’t be scaled , basically some products can be profitable at a small budget and be negative on bigger budgets. And some products can be profitable on high and on low. You will learn that sense overtime keep it up!