R-1234yf refrigerant leak at passenger-side thermal expansion valve (TXV) block connection / O-rings

Or at least that’s what Grok 4.1 tells me. 2020 Ram 1500 Bighorn. 81,000 miles. Only been using the AC during window defrost. High pitch hissing sound coming from front passenger dash/glove box area. What’s the fix? Cost? How long can I drive it before getting it repaired?