From the Pagespeed Insights feedback, the above is from the blog post and the snippet at the homepage. It is HTML heading and paragraph issue. I tried the font-display: swap CSS rule, but couldn't get them to work.
Are you being told it's too slow for the first paint? Look at the HTML it's loading, make sure images have width, height etc (painful but...), make sure there's not content that isn't needed.
Really we'd have to see the page, code, and offending content area to weigh in. Usually though you can get false positives in lighthouse for simply large elements with things like box-shadow, text-shadow, or linear-gradient applied to them. Especially if you've layered such appearances atop each-other. But without seeing the actual page? Who knows. I mean I've gotten that message when the offending element was actually BEFORE the one they were reporting the problem with. Nearby element interactions, complex "grids", and thousands of other things can trigger that Lighthouse warning.
I fixed it by adding the dimensions to the images. Thank you for both of you with your feedback. Again thanks.