@mrschewy: If you have an S Pen Fold Edition then it will be compatible with the Galaxy Fold5, however air actions won't be available. The S Pen Fold Edition for the Fold3 and Fold4 has different dimensions to the Fold5 option, so they're not all the same size. For full compatibility, you will need to get the Fold5 specific S Pen.
S Pen Fold Edition for the Fold3/4 Dimensions = 7.7 x 132.1 x 7.4 (mm)
S Pen Fold Edition for the Fold5 Dimensions = 5.9 x 120 x 4.35 (mm)
