If you allow me an opinion: this one's on the FIA. It's not the first time a cover is dislodged and cause problems (2019 Azerbaijan GP FP1, 2020 Portuguese GP FP3). One would think that by now there would be a Safety protocol for street circuits, with one of the points being "Verify the security of all drain covers and assure that they can't be lifted by drag forces". This would be specially important regarding current ground effect specs. The fact that they had no idea if the drain covers would hold up the cars passing at full speed over them is an indicator that somebody is not doing their work. And the one who should look up for safety is the FIA.