Not a bit. I always say Google is your friend.
But a few general rules must be followed.
Correct me but for the US. In the FTA hobby. A Universal lnbf should not be needed. As the only satellites using ku high band are dishnet and directv.
A standard linear polarization ku and c band lnbf should do. A very few circular polarized c band satellites can be received.
Still. Rules must be followed. And they are between E2 images. So everyone stays on the same page.

CONTROL SIGNAL
- LOW BAND(Vertical) 11.5 - 14.0V DC + 0 KHz
- LOW BAND(Horizontal) 16.0 - 19.0V DC + 0 KHz
- HIGH BAND(Vertical) 11.5 - 14.0V DC + 22 KHz
- HIGH BAND(Horizontal) 16.0 - 19.0V DC + 22 KHz

Your lnbf may be just happy operating off of 10-11 Volts DC that is carried over the coax from the receiver to it.
To switch polarities from vertical. Look at the table. The lnb will power on, it will operate fine. But it will only be able to receive vertical polarized transponders.

Inside of the lnbf "throat" there are 2 antennas placed 90 degrees apart. One to receive vertical polarized signals. And perhaps you can answer what the other one is for.
To switch between the 2 antennas the lnbf electronics needs a DC voltage above 16VDC.
The actual amplifier circuit in it will be regulated to be happy with (read above) 10 or so volts. And as it is regulated. 19 volts won't blow it out.
But. The antenna probe switch section will need a voltage higher than 16 volts to kick over and connect to that other probe.

That is done in your receiver. If you blindscan, manual scan and measure the voltage on the coax. You will see it alternate between the desired 13 & 18 VDC.

If we have a universal lnbf. And set it up correctly in tuner setup. The exact same as above happens when switching polarities in the high band.
Except now we send a pulse. Perhaps continuous. Of a 22 kilohertz (kHz) signal. Just above the human hearing capability. Signal along with the 13 & 18 VDC polarity switching voltage.
The lnbf electronics "hears" the signal and kicks in the high band frequency converter and that converted frequency range is sent down the coax cable to the receiver.

Remember. Where that high band conversion starts, where the switch for it operates. Is established in the threshold setting in tuner setup.

It would be a bit more fulfilling if we could stick on one subject. The .xml portion kind of fizzled out. What's up with that?