Until it's studied (anecdotes inform experimental and observational studies that could clarify this), it's hard to say for certain. The problem is how much data

Until it's studied (anecdotes inform experimental and observational studies that could clarify this), it's hard to say for certain. The problem is how much data is available from The Before Times™; it'll be hard to find people who are covid-negative, unvaccinated, and have any desire to get a tattoo soon after voluntarily becoming vaccinated, so I imagine an experimental study is largely out the window. It's easier to draw a parallel outcome that could speak to the above perception, though: I'll venture a bet that this is more a consequence of negative perception of the vaccine by the artists you interacted with; a drop in bleeding during tattooing would manifest in bloodwork as well, and I'd think such bloodwork would show differences in platelet counts, blood concentration, etc. compared to pre-covid samples. Not an expert; would love an expert opinion on this. But tl;dr: I wouldn't worry about it.