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Also, according to https://fiscaldata.treasury.gov/americas-finance-guide/feder... and https://www.cfr.org/article/how-much-us-aid-going-ukraine , the amount spent on Ukraine as a percentage of total government spending seems to be around 3%, not taking into account the fact that some of that might have been spent anyway (for example, old munitions that would have otherwise been replaced were sent to Ukraine).
It didn't happen in the UK, probably because of a populist prime minister (Johnson) who wanted to be seen as a Churchill figure throwing immense and unconditional support to Ukraine, it meant that pro-Russia elements couldn't really get any traction.
It is like being fascinated that the Indian right have different opinions, or the South African right. Or the Russian right. Or different factions of the US right wing. It is fascinating, but the UK voters aren't expected to be on the same wavelength as the States; Johnson or no Johnson. They have different interests and motivations.