5 years ago, OGS ranks were calibrated so that 1d OGS fell between 1d EGF and 1d AGA. Also see item 1 in 2021 Rating and rank adjustments
I assume it was OGS’ hope/intention that this calibration would keep up over the years, but I don’t think there are actual mechanisms in place to maintain it.
There are reports/indications that OGS ranks around 1d have gradually become tougher again. OP is the latest example.
English is not my native language. I don’t know which wording would have conveyed best what I intended to say.
I meant to say that 5 year ago it was an explicit goal for OGS to land 1d OGS between 1d EGF and 1d AGA. And I’d say this was actually the case after the 2021 OGS rating system update. Until June 2023 I did play somewhat actively on OGS, maintaining a 3d OGS rating (gennan). This was in accordance with my a long-time 3d EGF rating (albeit gradually weakening).
I’ve never played on Fox myself, so I rely on what other players say about how their Fox ranks compare to EGF/AGA/OGS ranks.