AML compliance for micro-cap altcoins – how do you even begin?

Been diving into some of the lesser-known altcoin projects lately, mostly for research, but I'm trying to wrap my head around AML compliance for these. When you're dealing with very low liquidity coins, sometimes on obscure DEXs, and the transaction tracing tools just aren't as robust as for $BTC or $ETH, what's the practical approach firms take? Is it even feasible to apply the same rigor, or is there a different tier of due diligence expected?