The two things are really not linked in a linear relationship. The protein you need to maintain your body, and the fat you use to fuel your total daily energy requirements - these are 2 mostly unrelated items.
No-one can tell you that your dietary fat must be a fixed ratio of your protein - because that will be wrong for almost everyone.
Protein requirement is a function of your lean body mass, if you know exactly what your LBM is then you can eat the RDI (0.84 g/kg) and be dialed in. If you don’t know your exact LBM, you can take a guess and aim for 1.0-1.5g/kg and be in the zone.
If you are not hyperinsulinemic and you don’t have kidney disease you can apparently err on the high side (up to 3.0g/kg LBM) without problems. You’ll burn it for energy, it’ll defray burning fat and you’ll make a few less ketones - but that’s mostly not an issue.
If you are hyperinsulinemic - too much protein will raise insulin which can be enough to inhibit lipolysis and stall weight loss. How much is too much depends on your insulin resistance.
You can certainly eat too much or too little Dietary Fat. The risk of eating too much plate fat is that you feel full, your body runs a bit hotter, your metabolic rate rises, and your body stores any extra energy left over.
So what is the minimum dietary fat you can eat? Well there is a limit of how much energy you can get from body fat - it can only deliver 0.9% of its energy every day. So you will need dietary fat at some point just to meet your energy requirements. If you are hyperinsulinaemic you may not be able to use any body fat at all until you lower your insulin.
The risk if you eat too little plate fat is that you get hungry, your body runs colder, your metabolic rate drops and your body will go looking for energy to meet it’s shortfall. If your body goes looking for energy, and it can’t get it from body fat, it will scavenge some from lean body mass.
If all that is too complicated the the simple version is eat 20g carbs, 1-1.5g protein/kg LBM, fat to satiety and let your body manage all the calculus. And if that stops working, lower your insulin further.