Question about Position Sizing for Yield Farming

I've been trading normally for a while, but recently I've been looking into DeFi, specifically Yield Farming. I find the returns interesting, so I've started to get involved. However, I'm still confused about position sizing. When we enter a pool, the risk calculation and position size are very different from Futures or Spot trading that we're used to, because there's Impermanent Loss, Gas Fees, and other variables that are not the same. I'd like to know how you guys think about or approach managing position size in DeFi, especially for Yield Farming. Do you usually focus on AUM, or are there other factors you use to make decisions?