@Flintstone, Please share here full screenshot from software information section in settings.
Latest software for SM-G715FN for BTU (UK) variant is G715FNXXSBEWB1/G715FNOXMBEWA2/G715FNXXUBEVL5
In my opinion you have latest avaliable version for your phone. Nothing to worry about. Future updates will come in due time.
@Flintstone, Has your phone install previous updates so far ?