So, once again, you should use coolant that conforms with TL - VW774J - which is exactly what G13 and G12 EVO are - but they are different and one should never be used to top up the other???
Still no mention of these silicate in bags though - for early 2019 or late 2019 cars/handbooks, and no mention of a time limit of any VW Group coolants, in my time as a VW Group car owner, ie since mid 2000, the engine coolant is for life, though with engines that have cam belts that is just academic as coolant tends to get replaced when the belts get replaced - now that more cars have chains and no service replacement period quoted for these newer/better belts, cars will be running longer with the original coolant in them. Even Fords back in the '80s used long life coolant although I did tend to replace it at about 8 years.
Edit:- this was being written while you posted Damo H!
Another Edit:- seems like some VW Group owner's handbooks quoted the same coolant spec for G13 and G12evo when in fact the VW Group spec for G12evo is TL - VW 774LJ !