There’s a long list. It looks pathogenic to me, but I’m no expert. These are from ILGM? I’ve seen pathogens coming out of Royal Queen lately, and I worry the big EU seed banks are all using the same wholesale production facilities.
But if it’s a pathogen,and it vectored in through the seed itself, we’d probably see more posts with similar issues.
Are you growing other plants from seed? Lettuce perhaps? Are you in an agricultural area? Are you keeping your hands clean? Are you keeping germination trays sterile? Reusing soil? New bag of soil? I feel like grow stores are notorious vectors for pests.
Or it could be a deficiency. And that’s not necessarily due to nutrient absence; sometimes an excess of one nutrient can antagonize another, leading to deficiency.
It doesn’t look like pest damage to me, but again, I’m not an expert in deficiency or pests.
Stay focused on new growth, which looks okay to me.