Obviously no clue in terms of the quality or how many amps it can handle/push, but Wurkkos now also offers a 26800 (7500mAh, with USB-C charging port):
Title in the link and description state 7800mAh, but wrapper on the battery shows 7500mAh.
Would be nice if @Wurkkos or @Wurkkos_Terry maybe could provide a datasheet or some more specs about it, like Continuous and Maximum Discharge Rates, exact length, etc.