RLP and Hessen are fine.
Fear of steel at 100% safety,... hardly exists anymore with today's evidence. The question is rather what was assumed, such as the ground conditions, meaning no soil samples were taken or similar.
Were finite elements taken into account.
That's where the wheat is separated from the chaff.
And the client can end up stuck with a damage.
Of course, everyone also looks at the price,
but no one with a university degree is so stupid
and then delivers accordingly to the price.
Especially structural engineers have been in high demand for years
and choose their projects.