Hello David,
If the floppy disks are 3.5′ you would need a Mac running macOS Mojave(10.14) or earlier and a USB Floppy disk drive.
Apple removed support for the Hierarchical File System (HFS) on vintage Mac floppies starting with Catalina.
Alternatively, you can use a PC paired with the same USB floppy drive and some software to recover the data. Tap or click here to see a writeup on the procedure.