Bingfu FM Dipole Antenna 300 Ohm with 2 Pin Bare Wire Twin Lead for Indoor Digital HD Radio Table Top FM Radio AV Audio Video Home Theater Stereo Receiver HDTV TV Tuner

It’s a T antenna like this: https://www.amazon.com/-/es/alambre-desnudo-interior-Receptor-sintonizador/dp/B07MG2XYR6 I’ve tried the 300ohm and it makes no difference

If you can't connect to an outdoor FM antenna, a folded-dipole is the most common solution. It's effectiveness will depend upon transmission strength and your location, but they usually do pretty well in urban areas. Here's one from Amazon: https://www.amazon.com/Bingfu-Terminal-Bluetooth-Receiver-Amplifier/dp/B07MG2XYR6