"If someone tells me that this has nothing to do with each other, I will stop considering this person reasonable!"
There are more schemes up their sleeves. Once they have the DNA information of a population they can do many different things, because the DNA of the population remains relatively unchanged. A study in 2021 followed after the introduction of the SARS2 virus and Covid19, which was first discovered to be in the wild in 2019. The jabs claimed to be vaccines for Covid19 were first introduced in Dec. 2020 in the USA, IIRC. I don't know when the various different jabs were introduced in different countries, but I don't remember hearing about vaccines introduced elsewhere earlier than Dec. 2020.
All of these events predate 2021 and the acquisition of Ukrainian blood samples you describe. The Ukraine is an interesting place to collect DNA, as a crossroads for millennia of different peoples. A list of populations that emigrated to the Ukraine is quite long, and there are even some that may have arisen there deep in prehistory, with the earliest archaeological finds of human activity dating back ~2M years!
Almost any European nationality, and many others too, can be found in some Ukrainian neighborhood or another. That makes it a good place to acquire DNA samples for research into European nationalities. Knowing who DNA comes from is valuable to researchers, but they can acquire our DNA without our cooperation by sampling sewage, for example. They paid the money to be able to identify who the DNA samples came from, because they could have got it without identification from the sewers.
Thanks!