It depends on the tyre as there are both directional and non-directional asymmetrical tyres as it depends on the tread pattern (there’s even asymmetric with different tyre compounds across the tread but I’ve only seen those in motorsport were they have high loads and weird wheel geometry). Easiest thing is to look at the sidewall of the tyre and if there’s an arrow, that’s the way the tyre should roll when going forwards.