Well,
Nobody seemed to have an answer for me on why this Boss FS-7 foot switch set to momentary- and the time on the block to be controlled set to a note value- would not actuate the Tap Tempo, so I continued to play with this.
What I discovered is that the FS-7 apparently won't activate the Tap Tempo- no matter how much I swear at it!
I also found that when the FS-7 is powered up, to allow the lights it has that indicate which of the 2 switches is on, it wouldn't work at all as desired.
However, when not powered it works just fine for changing the values of the blocks. No lights, but neither do the other remote switches like Robberns Infinity Remote, or the Mission Engineering remote switch, etc.
So, I reassigned switch 3 on the Stomp to Tap/Tuner, and I'm using the FS-7 for controlling the blocks, AND I freed up a port on my Mission Engineering 529i Power Brick/Battery by not having lights on the FS-7.