I'm not sure where you are getting that from. Attwell was indeed referee, but Oliver was the VAR. I've already posted one link. Here's another.Atwell was ref but Tierney was on VAR
Premier League (Sky Sports)
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Tierney was referee for Forest v Leicester on the same day.
Nottm Forest 2-0 Leicester (14 Jan, 2023) Final Score - ESPN (UK)
Game summary of the Nottingham Forest vs. Leicester City English Premier League game, final score 2-0, from 14 January 2023 on ESPN (UK).

