Are you positive those wimpy ones are peppers? Is this old soil? Weeds?

Other than that, those four look decent.

Robert is probably right,it isn't unusual for a few seed to not sprout.

I see water drops on the seedlings, but your potting mix looks dry — especially around the edges. Whatever it is that keeled over probably just needed more water.

As I understand it, this isn't a germination problem. It's a "drooping" problem. Several possible problems. Too little water is an obvious one. Too much water is a less obvious one. Also, poor illumination will lead to elongated stems that fall over. You need strong light immediately above the plants, as in, within a few inches. Damping off is a fungal infection of the lower stem. Can happen in unsterile soil. Timberrrr. But you'd see that as a discoloration where the stem meets the soil. The stem literally dries up at the base. In the case of damping off, those plants are done. In the other cases, you could probably get them to recover.

With a course potting mix like yours many seedling tap roots can not penetrate through the larger growing media particles such as wood residue and will coil up directly below the surface. This will cause the seedling to exhaust all available nutrients and keel over to die a horrible death from starvation and dehydration.

Gently remove one of those two wimpy plants laying on it's side with the very small undeveloped Cotyledon leaves and look at the root. It should have penetrated the soil at least 2 inches or more by now and see what you have. They don't seem to exhibit the tell tale constricted stem at the base common with damping off condition but pulling the near dead plant will tell.

I'm not sure about that. Tap roots have a way of meandering around small obstacles, and that mix doesn't look at all impermeable. As long as the medium is friable, root development should be fine. Push your finger in it. Can you penetrate it easily? If you can, plant roots will as well.

You’re all good if you keep it moist but not soaked. Looks like they just need some good light to me. A 12” $20 LED from Lowe’s would be perfect or even a cfl in a desk lamp. The other thing I noticed was fertilizer pellets in your soil. Seedlings don’t like a tone of nitrogen. Next time I would try a potting mix which is basically just peat and perlite. More light! Best of luck!

I think banna's question about her/he/it's plants would be more suited for ChatGPT with responses coming from chat bots, and not a discussion where participation involves interacting with people with decades of experience who had the courtesy to enter into a discussion the original poster instigated for help.

Bots have no curiosity a real human would have after participating, and bots requires no feedback a real human would normally give back as a courtesy for helping. Are you a bot?

Yes, people tend to drop in here with a question, but never show up after that. The OP is usually not trying to instigate a discussion, but just wants a simple, quick answer to what may be a question that demands some discussion.

Dan, it's aggravating when many good suggestions come up in a discussion but the OP hasn't the common courtesy to reply with the outcome. Many who don't even thank others before or after the fact lack psychological maturity an a hallmark of a cuddled generation.

That's what I like about this forum, where good questions actually provoke some thoughtful discussion. People want simple, quick answers to their (usually overly) simple questions, and are impatient with the "but what ifs", "maybes", and ranges of credible answers.