As a pure Bar we are still not allowed to be opened, but if you consider to change your bar and include food, basically to become cafe or restaurant in whatever form allowed, you can get more outside place for the sommer (Fri, Sat&Sun 11:00 - 22:00) (including parking slots, if such exist in fron of your place).
You need to however apply fast, the due date is already tomorrow.
Link: https://fixmyberlin.de/friedrichshain-kreuzberg/terrassen