He definitely does have a plus to double plus FB and it's gotten better since 2020 not worse.
Avg velo is 94.2 but when you factor in his 100th percentile extension the perceived velo is 96.5 which is good FB velo.
His FB VAA is -4.3 degrees which is borderline elite VAA.
His FB IVB is 17.1 inches which is good IVB
His FB H-Mov is -10.4 which is very good H-mov.
So the total package is good velo when factoring in extension, borderline elite VAA, good IVB, and very good H-Mov. That's easily a plus pitch.
2020 and 2021 his FB had a run value of -4. 2022 and 2023 his FB has a run value of +13. Taking off some velo but adding extension has improved his FB command while not impacting the perceived velo or movement profile.