This is normal, i sent twice before, recent one was in Dec last year, took 2 months to get back my PSU, the earlier one was 3 months.

The model i sent was AX1200i, first RMA was in Dec 2021, took 3 months to return a refurbished unit. I kept until last year my another HX1200i died, so i have to replace with the refurbished AX1200i, one month used only it died again, so i rma again in Dec 2022, last 2 weeks they email me said Corsair proposed replacement with a brand new HX1200, since AX1200i already EOL, I accepted and collected the PSU on the past Monday.