German manufacturer AS Motor has announced a whole new range of landscaping machines based on the EGO 56v battery platform.
https://www.as-motor.com/products/?electric=1&_ga=2.15768502.1851110912.1625292688-942542610.1625292688
Some of their equipment will be compatible with the 28ah backpack battery and feature the EGO Peak-power technology (2x56v).
AS may not be that famous in the US but it's a highly regarded professional brand in Europe. They build indestructible mowers designed to perform in rough conditions (tall grass, uneven terrain, steep hills).
This new system is expected to be available in 2022. AS previously released a couple of models featuring the Briggs and Stratton 82li motor (similar to Snapper) before switching to EGO batteries.
Also one has to note that unlike Kobalt, Greenworks, Greenworks Commercial, Stiga, Powerworks, Menard and Snapper, there is no artificial trick to make the battery incompatible across brands.