Doesn't it not matter? The ring foundation is correct. With us, boards were set up and then the foundation was poured. Later, the boards were removed again. I see nothing wrong with that.
Whether the foundation is reinforced or not and whether the concrete cover of at least 5 cm for the reinforcing steel and a foundation earth electrode made of round or strip steel have been observed can only be confirmed afterwards by electricians with "paranormal" abilities at the meter registration after a glance at a connection flag protruding from the ground.
What the foundation earth electrode has to do with it is a mystery to me. Besides, you only have to see it exactly once and then you can do it yourself. Just throwing the thing briefly into the trench is not rocket science and I think the people responsible for the foundation are not doing it for the first time either.
Throwing it "into the trench" without spacers is only permitted with NIRO, material number 1.4571 (V4A), in unreinforced foundations. If the foundation or the slab is reinforced, even this is not enough, because then the screw connections every max. 2 meters are missing.
I already know the term rocket science from another user, coincidence or your alter ego? The masons are responsible for the foundation; for the foundation earth electrode since DIN 18014:2007-09, only licensed electricians are responsible, who must document the execution with measurements and photographs.
You probably wouldn't bet on a standards-compliant execution, and if you are identical with a self-proclaimed "practitioner," as I fear, you would already fail due to ignorance of the current DIN 18014:2014-03. You can easily disprove the assumption that you are competent and I am wrong by answering this question promptly:
What is written on page 13 of DIN 18014:2014-03 in the first line of text?
A shell construction company is free to do without simpler formwork. But it is doubtful without the prescribed measurement documentation that the foundation earth electrode or even just the connection flag was installed in accordance with standards.