Try wrapping the chain around the entire cog, both front and rear cogs individually. If it’s the right size chain then it will map against the cogs perfectly. Hold the chain tight (obviously easier to do with the parts off the bike) and see if there’s any raised spots. Any thing raised in then chain indicates that the teeth are not compatible with your chain dimension.
Some chains are direction specific, though i suspect that only effects shifting, with the text (manu logo) to be send from the outside of the bike.
Re-tight spots, find the tightest part of the chain, slacken off your front ring bolt s a little and then tap the chain (in the tightest spot) with a big screwdriver handle. Re-tighten your bolts individually but opposite to one another a little each at a time.
also – do you know how to calculate your chain line correctly. Don’t go by eye, you ideally need callipers to get an accurate measurement.