FabioR 🇩🇪 I support this @mihad0x1, and if those two options don’t work I could also suggest using Isopropyl Alcohol (99% alcohol, safe for electronics). Turn off the phone, put a drop of IPA on a cotton swab and rub the edges of the lock button. Then click it a few times to let the alcohol spread inside, and let it dry for like 15 minutes. This could work if some moisture got trapped inside.
If nothing works, I suggest you contacting the Nothing Support, since I believe you’re still in the warranty time. Keep us updated