Each air fryer is totally different each in capability and in temps. It’s possible you’ll need to do that in smaller batches relying on the scale of the air fryer you’re utilizing. I exploit this air fryer.
If the broccoli overlaps within the basket a bit at first, that’s okay – it’ll scale back in measurement to ultimately make a single layer for the previous few minutes of roasting.
When you’re doing that last roast at 375 and never getting sufficient crisping, go as much as 390!
When you don’t have a basket air fryer, that’s high quality! Therapeutic massage the water and oil into the broccoli florets in a separate bowl for a minute earlier than putting them on the tray. I nearly consider this as “marinating” the broccoli with some moisture. The broccoli will maintain onto that moisture (even when it doesn’t take in it fully) and it helps maintain it tender whereas roasting. 
