So many thanks for all you folks for your replies! I am definitely going to follow up on Noel's and Oldmuso's posts. Some of the instructions are a bit deep for my newbie knowledge and skills, but I think, just getting that understanding of them will be priceless!
I guess I should have explained that the way I use Reaper is that, after writing and arranging the song in BIAB and saving it, I open a new project in Reaper, start a new track, add BIAB plug in and on the BIAB window that pops up, go to File, open up the song from BIAB, hit Generate and than click and drag all the tracks over to Reaper. It's been working really well, and I do get the opening click lead ins, but as I used a drum lead in on this song, I got the click but not the drums.
So, in the meantime I did figure out a work around, although perhaps a bit lengthy and not so elegant.
In BIAB I muted all the tracks except the Drum track. Then I exported the drum track as a .wav file to my comuputer.
Than, in the Reaper project (I had already dragged all the other tracks there) I just did Insert/Media file and inserted the drum track .wav file from my computer. It all worked fine.
Let me know what you all think of that process.
Thanks again for all the help!

2023 BIAB Ultrapak, Reaper, EZDrummer 2 & 3, Roland VS-2480, Tascam 38 Reel to Reel 8-Track