Help needed: aligning dates in multiple colums.

tanmanflanjan 

I do not have add-in to play with actual data, thus on such model

DD and Value are arrays returned by formula. Result on the right could be generated by

=LET(d, D6:D22, stockdates, E6#, stockvalues, F6#,
  k, SEQUENCE(ROWS(d)),
  values, XLOOKUP(INDEX(d,k), INDEX(stockdates, k), stockvalues,,-1),
 IF({1,0}, d, values))

 Instead of ranges for stockdates and stockvalues you may use your formula. And, in general, there is no need to output dates for each stockvalue.