A somewhat ominous sign for DeVries:
https://the-race.com/formula-1/what-alphatauri-seat-fit-means-for-ricciardo-and-de-vries/
"Daniel Ricciardo has had a seat fit for AlphaTauri’s Formula 1 car as part of his 2023 Red Bull role.
It comes in the context of one of AlphaTauri’s two incumbent drivers, Nyck de Vries, having a difficult start to his rookie season. The two situations may be entirely independent of each other. But ahead of a triple-header of tracks De Vries knows well, the pressure appears to be increasing.
His reserve responsibilities are quite sparse, as he is only expected to be present for eight grands prix this year in normal circumstances. But when he is on-site, Ricciardo is believed to offer cover for AlphaTauri as well as the senior team. And this is believed to be why he has been in AlphaTauri’s Faenza factory for a seat fit. ...
The only reason a reserve driver option having a seat fit at AlphaTauri has gained attention is the context of De Vries’s rookie season. De Vries landed his AlphaTauri seat after scoring points on a shock F1 debut last year in the Italian Grand Prix, where he only replaced Alex Albon at Williams on Saturday morning. But at the start of his first full season in F1, De Vries has been comprehensively bested by third-year driver Yuki Tsunoda.
The 2023 AlphaTauri has not been an easy car to drive, lacking load under braking in particular, which has made it awkward to deal with on corner entry. But in tricky circumstances De Vries has not been able to match Tsunoda’s performance so far.
He’s 0.328% slower than Tsunoda on average in qualifying, and 4-1 down on head-to-heads. The difference is also clear in races. De Vries has a best finish of 14th (Bahrain, Saudi Arabia) while Tsunoda has two 10th places and has finished 11th three times. De Vries has only made it to Q2 twice, in Australia and Miami, and crashed twice in Azerbaijan in qualifying and in the race, which he called a “very silly” error. ... "