Are there any modems that allow to set the channel for LTE?

I am looking for a modem where I can use AT commands to set the EARFCN (channel number) for LTE or 3G or 5G networks.

You can choose the 5G module from QUECTEL. Most of their products support 5G, LTE and WCMDA.

Do you know if the Quectel modules would allow me to set the channel? On other modems I can set the bands using AT commands but not the channel, so I want one that lets me set the channel.

You need to refer to the RF_FTM document of QUECTEL.