Tvheadend

Hello friends
I have been having problems with searching several frequencies for some time
My card is tbs 6921
At first, I thought there was a problem with the driver, and I tried a lot to solve the problem with different Linux operating systems, but it didn't work.
In the end, I thought to use the Windows driver anyway
I created a sat > Ip server with dvbviewer
I search the frequencies on any system without any problem and I have signal and quality and the services are recognized
But in tvheadend, for example, at frequency 12034, yahsat satellite has no signal and quality, even though sat > ip is also used.
This problem is really annoying, please help me