Well, if this gap on the floor does not bother you and does not cause inconvenience, then it is better to leave it as it is. If it provokes or may provoke problems in the future, then you can fill this gap with mounting foam. It may be best to cover spc flooring. This will look more aesthetically pleasing, and there will be no risk of moisture or insects entering. This floor is in my garage. It is waterproof and absolutely wear-resistant. I am satisfied and have never regretted my choice. In any case, you can consult with specialists and then make a decision. That's the best way to do it.
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