JohnnyW85 wrote:I don't have a rulebook with me and i cannot find it.
How many objectives one unit can hold in 8th edition? Is there any restrictions about this?
As many as they are within range of. No rules say otherwise. You can conga-line a unit of grots all you want and hold 7 trillion objectives for all the game cares.
Of course, this is all dependent on the individual missions, since objective rules are technically bespoke now and unique to each mission. A mission might restrict this in the future as it's own special rule.