It's not wrong, Apex doesn't really use a set FOV Type in-game or in the config file. It's intended to use 4:3 in-game, but it's slightly off due to lazy coding as previously mentioned.
When the FOV Type is set to multiplier it means that the value you put in must go through some kind of mathematical formula to calculate the actual FOV (which is important to the calculation). So Apex use Hdeg 4:3 as the base, but both in-game and config file values must go through a formula.
BO4 uses Hdeg 16:9, which means the configured FOV is for 16:9 aspect ratio, any other ratio will have the FOV calculated based on this.