It depends on the chain and the coin. On BNB Chain the panel has a Slippage menu with Auto, 0.5%, 1% and 3%. Auto starts at 0.3% and adds a little for larger trades, up to 1%.
On Robinhood Chain the panel uses a fixed 1%. Imported coins also use a fixed 1%. On Solana the curve trade uses a fixed 5% limit, and the panel has no menu for it.
If a trade keeps failing on slippage, try a smaller amount first. Raise the setting only when you accept a worse price.