I just happen to have germinated tomato seeds the other day and took a photo at day 1, 2 and 3 after emergence.
Im not trying to patronise you, I just find my way works perfect every time so thought you might like to try next time something similar.
I used a $20 - $30 heated propagator and standard multipurpose and germinated in the pots you see in the photos.
The day after the 1st photo I took them out of the machine and into a greenhouse all day ( or windowsill will do ) and then used 2 T5 lights taped together indoors from about 7PM to midnight. Then next day indoors with lights again on a windowsill.
The 3rd photo I took just now and is a 3 day old seedling.
DAY 1
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DAY 2
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DAY 3
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