This page WG5 Fortran - Fortran 2023 still says “Fortran 2018 is the current standard.”
But the ISO website tells another story 
:
General information
- Status: Published
Publication date: 2023-11
Stage: International Standard published [60.60]- Edition: 5
Number of pages: 674- Technical Committee : ISO/IEC JTC 1/SC 22
ICS : 35.060
It happened yesterday, the 17th November.