Many options for the trimmed sugar leaves. Some people decarb and infuse in butter, oil, etc. Some make bubble hash, etc… You can also put them in a ziploc and freeze until you decide what you want to do.
The trimmed fan leaves will have little to no THC, I used mine to make some pesto and similar, think of them as supergreens if you want to consume.
Regarding the trimmed sugar leaves, personally I grabbed a trim bin before harvest and left the trimmed sugar leaves in there to dry then crushed / brushed them around on the trim bin screen to collect the kief. Hoping after the next harvest to have enough to have a go at making a temple ball…
The trim bin may seem pricey for a few pieces of plastic and some screen, but it made the process very clean and allowed me to collect a lot of kief that would have otherwise been lost.
Many ways to skin a cat as they say.