KMC makes reusable 11 speed links.
https://store.kmcchain.us/p/missingl...-reusable?pp=8
The link is installed on the top run of chain in the field without pliers. Sit on the bike and pedal forward.
The pliers are worth the money. You will wish you had gotten them sooner.
A short section of coat hanger works for installation and removal in the shop with pliers.
-Tim-