Not to take a negative view, it's just an unsexy skillset and doesn't attract a lot of talent and attention.
Trying to hire for folks who can gracefully manage on-premise networks, power, and hardware is possible and extremely challenging. "Cloud," as it is today, is here to stay.
I've been hearing this "Cloud will DESTROY on-prem because on-prem skills don't exist and standardised cloud technologies make it easy to hire from anywhere across the world!" narrative for years which seems to deny the reality that we managed to train people to run datacenters just fine for decades even if people are snobbish about the riff-raff running things these days. Larger companies long ago figured out they could work with schools to develop a mutually beneficial training and employment pipeline. A lot of managers seem to be too lazy to do such things and find it easy to simply delude themselves into thinking cloud is always the best choice instead of contemplating doing hard work like that.
The primary focus of this purely infrastructure position, is a coding take home. Now, infra as code is part of local cloud, but there is sooooo much more to handle.
But because they have no idea how to handle infra, they seem stuck thinking it's just a dev job. Even while they hire stating it is not.
Quite sad. So much knowledge lost, that they don't even know what to look, what to hire for.