try posting on vegetable forum since tomatillos and tomato are totally different plants

Germination needs right temperature and just enough moisture. You dont need light for germination, in general. But once they sprout then they will need light.
The cooler the soil/growing media temperature , the longer it takes. For example, optimum temperature for tomato germination is 75F. At that temperature it will take about 5 days. But if you do it at 65F it might take over 10 days. With pepper it is even more temperature dependent ; Optimum temperature of about 85F.

I would suggest that you be patient.

There are also questions of : Seeds viability, and the dept that they are sown.

Sey

Some seeds do not like direct seeding right in the soil. Nor do seeds first in soil like drying out. Start to sprout, then die. Steady moisture but not pooling wet. Too much water they rot. Why it is mentioned controlled seeding indoors works best and gets a much better germination rate. A bit cool but not a total loss. you could cover the location with something as simple as a plastic bag or even a couple layers of wet paper towel or newspaper. (add something to hold it down) rocks or soil on the edges.

In cold climates they self seed all over if fruit falls in the Fall then freezes...the Spring thaw they sit in their rotten mess that keeps them wet...

I must have a dozen or more left behind fruit in that part of the garden and usually get a few returns every year. Not nearly the amount of seed left behind germinates like inside controlled seeding.

Anytime i direct seed in early Spring with cooler temps, I seed again a week apart or every few days) for 3-6 weeks depending on the plant. Heavy rain storms for days or no rain can cause problems. Early peas can rot too wet, salad seeds can completely wash out of the beds. (i cover them with a slat frame or a boards.)

I would add a few more seeds to that spot, then cover. A zip-lock may give you a greenhouse effect and help warm the soil. One of those clamshell domes from the grocery that cherry toms come in...poke a few holes...and watch for sprouting. Many use the gallon water jugs with the bottom cut off as a mini greenhouse to get an early start. Just take the top cap off so the seedlings don't bake after they sprout. Best to have insurances and back-ups. You can snip out the ones you don't want later. Expect only 50% direct seeding.

If all my peas come up after 5-6 weeks of sowing, that's fine, more peas for me. And sowing over that length of time i have them ready for harvest over a longer period of time, in succession. Usually one sowing is lost to something like birds, field mice, heavy rains...

thanks all!!

Where are you? Not just zone, but city and state (or country).

actually outside of the US right now (expat). Living in Beirut, Lebanon. lows at night go about 45-50F

still no sprouts, meanwhile my nasturtiums which i planted the same time have already grown about an inch

It might take a while, or the seeds may not like being planted directly.

Try starting some inside in small pots where you can control the moisture better.

I would think the temperatures are too cold for germination. I would try to germinate them inside. Tomatillo require warm temperatures to grow and would require warm temperatures to sprout.

I germinate tomatillo seeds in the same manner as tomatoes and peppers. I do not recall them taking a long time to sprout. I start them indoors in flats with heat mats and humidity domes. My only issue with tomatillos is once they sprout, under my lights they can get leggy and out of control very quickly. Therefore, I try to minimize their time from sprouting to plant out. I start them and plant them out at the same time as peppers.