You could drop them in a glass of water,if they sink immediately this means the seed is already full of water and should germinate if there’s some life in it,I always use a small bottle with a cap on it,with a 1/3 water and I drop my seeds in there and place the bottle on a small 5w heat mat that normally use to grow my mushrooms on
Depending on strain seeds take between 1 and 4 days to be ready to be planted
If they take longer than 6 days they probably have no life in them and I would file a complaint with the breeder,most reputable breeders probably will send you new ones without much arguing
If the seeds don’t sink this means they’re not able to soak up water so they won’t start growing
If this is the case you can try and scrape the surface of the seeds a bit so water can penetrate a bit more easily
This often happens when seeds are not stored properly for a longer period of time
Happy growing 🌱✌️