Brexit is working as intended, yeey! More NHS funding ... oh what, wait, what... oh dear, the xenophobe conservative clowns were lying? Oh no! Never would have crossed my mind!
In practice of course Brexit has done no such thing as the immigration rules in the UK are still optimized for mass immigration, as the Conservatives are so much not xenophobic that they prefer to enrage their own voter base than restrict immigration by even small amounts.
As for healthcare spending, the massive jump in NHS spending during the pandemic more than consumed the former EU contributions. The EU funds did indeed go to the NHS and then a lot more on top. If the UK was still paying in, then inflation would be even worse.