The point is not all those 7 being built concurrently. The delivery of last hull safely marks 2030, or end of 2030 if everything goes as planned.I mean since 7 are under construction, it could maybe make sense to sell one of the second batch, but selling not one but two from first batch after staff have been assigned is not nice.
That means, TN is getting 5 frigates by 2030 and 2 more will be constructed (hopefully) to be delived by 2031.
4 of our Gabya's are not up to date, other 4 makes it barely to the end, 2 of Yavuz class frigates withdrawn from active service, for 'training' duties since it started to lack spares and maintenance, 1 one the Barbaros class goes through MLU which takes roughly 1 ½, years with acceptance procedures and above all, add the drydocking schedule. All in all, we are quite shorthanded up until 2030, despite the mobilization of entire shipbuilding capacity.