You are right, going to the gama under expert settings there is no ST.2094 which is HDR 10+ so my TV is not capable. The strange thing is that it's a 2017 QLED with firmware up to date (1270.3). Thanks for your help.
@vangeliis , i don't see gamma ST.2094.
When i play 4k uhd content i get gamma BT.1884.
When i play hdr10 and hdr10+ content i get gamma ST.2084.
When i play HLG content i get gamma HLG.
My gamma has not ST.2094. Does this mean no HDR10+ ?
It looks like some 2017 tv's have that option and some don't, I know that 2017 QLEDS like mine share the same firmware with the mu series. The sad thing is that QLEDS have greater luminosity (mine should reach at least 800 nits) so not having HDR10+ is a shame. Come on Samsung!