A “75%” keyboard adds a Del/Home/PgUp/PgDn/End navigation column on the right, moving the arrow keys to the right and allowing space for full size arrow keys where the up-arrow fits beside a shortened right shift key.
Example image from a related discussion: 75% kb layout with dedicated Home/Pg Up/Pg Down/End? - #2 by IOpo
Apparently, 2021-2023 HP Aero 13 laptops fit a 75% keyboard and are only 2mm wider than Framework 13, so width is close to wide enough. (That keyboard has half-height up/down arrow keys, though.) 75% kb layout with dedicated Home/Pg Up/Pg Down/End? - #5 by gcf