At risk of being a massively unpopular opinion: Ukraine has a track record of being an unreliable trading entity against other European countries, to the point where it looks like they were actively stealing gas that was sold by Russia to e.g. Germany.[1]

Under these circumstances, I'd much rather avoid being dependant on Ukrainian gas and would prefer Russian one every day of the week.

[1] https://en.wikipedia.org/wiki/Russia%E2%80%93Ukraine_gas_dis... (definitely worth the read, gives some background information about why we see what we see in this russoukrainian war today)

I have said this claim many times but it does not match the numbers I have seen on e.g. Wikipedia. Most of the gas seems to be in areas under Ukrainian control.

If they are in russian occupied territory, they can forget about them.