I'm trying to create UNIQUE alternative for Excel 2019 as It only works in Office 365, but I don't know where to start.
=TEXTJOIN(", ";1;UNIQUE(IF($B$1:$B$100=A2;$C$1:$C$100;"")))
https://dollarexcel.com/how-to-get-unique-values-without-unique-function/
I've been trying to use this one, but I don't know where should I put the MATCH function in the IF or in place of UNIQUE.