Weight vs calories for the past 2 weeks, how do I find out my maintenance?

(Sorry it’s in Spanish but it’s pretty straightforward)

For context I’m 5’1 and pretty active (running about 20 miles a week and lifting Monday-Friday).

I know my calories are generally pretty high compared to a lot of people my size but so is my activity level. According to happy scale I’m losing weight but not sure that’s really accurate bc of fluctuations.

How do I know what my TDEE is?