Hey there! You can definitely still be vegan and not follow 801010, I don’t! You just need to find out what works for you and your body. Everyone is different; some people thrive off 801010/raw vegan/high fat/high carb/cooked foods etc etc. There are no rules! Don’t feel like you need to do the latest ‘trendy’ way of eating.
Definitely keep eating at least 2500 calories, especially if you’re active or still growing! But again, this depends entirely on an individuals own energy needs and expenditure.
Make sure you’re keeping variety in your diet. Eat a wide range of whole foods (fruit, veggies, nuts, seeds, legumes, wholegrains), play around with different macros, try new foods and recipes, experiment! If you want to keep eating low fat that’s completely up to you! If that’s what makes you feel best then go for it. Just make sure you’re consuming enough food and are getting all your essential nutrients.
Good luck! And good job on sticking to veganism! Your body and the earth will thank you for it :)