It’s hard to generalise without being there. It may be dangerous or it may not, and you have to decide on the day. The important thing is to inspect the fop before the game and make a decision about its safety. If you think something is dangerous then don’t start the game until it’s been dealt with. That’s the question you have to ask yourself, and this is why a pitch inspection is important.
I did a game many years ago. When I did my pitch inspection I found that the goal posts had been moved two yards to the left and put into metal boxes in the ground. The old boxes were still in place and had been left an inch proud of the surface - one was two yards inside the goal post, the other the same distance outside the opposite one. Anyone sliding across one of these would get seriously injured, and being on the goal line it’s likely someone is going to do this. If you check and miss something you cannot be held responsible. If you don’t check and someone is injured by something you could have seen you could be hung out to dry.
Are these covers sticking out of the ground so someone sliding across could get hurt? If so, they would be dangerous. If not then probably not.