So I'll preface this to say that I understand the shipping & manufacture delays.  But let me ask why this occurs. 
I placed an order for the Titleist T100s/200 combo set last year, in September, and was told it could be early '22 until it was done.  Which I was fine with.  Now I'm being told late May for my original KBS shafts.  Disappointed?  Yes, of course, I've waited this long but was willing to wait a few more months.  So since I have to wait anyway, I asked just to change to the newly released KBS Tour Lite shafts. 
Now here is where it gets tricky.  I've been told by my rep that I "could" change the shafts, but it could possibly be pushed back even further.  Why?  Because it's like starting a whole new order.  They can't guarantee that the original heads can get "matched" to those shafts in the original order, so new heads need to be produced & these heads will be used in another order.  Instead of saying "hey, let's keep these heads over here in this pile & wait for the shafts to come in, then we will build it."  Then it would be on or about the same timeframe, right? 
I don't get it?  I'll bet if I was a Tour Player, this wouldn't be an issue.  They would "find" the shafts & heads with no problem.  But apparently TT members get the short end of the stick. 
Signed, frustrated golfer patiently waiting ......