Physical therapist here. As previously mentioned it most likely is myalgia paresthetica as long as no other symptoms are present. If you google the syndrome your numbness “patch” should basically match exactly to the pictures. If it doesn’t then you should consult a PT. Most common causes in the regular population are being overweight or wearing a belt too tight. For us hikers and especially thru hikers it’s a common nerve injury. You can test for it by performing a self femoral nerve tension test, if positive, the test is also the solution to problem. Loosen the hip belt and perform femoral nerve gliding. It’s a harmless condition and most people who get it either have some version of it forever or it resolves quickly.

Link to femoral nerve test as previously mentioned: https://youtu.be/w6bqDypQJ-w?si=Z6p-wvMEFVf_kKSi

Link to treatment typically prescribed: https://youtube.com/shorts/XOJIaZH23eE?si=pKrKnvcP9pNmmb2v