Unable to re-download iMovie on MacBook after updating.
I recently updated my MacBook Air (2017) to 10.13.6 as it is the newest version available to me. To be able to do this update I had to uninstall and delete quite a few things and I didn't realise but I deleted iMovie. When I try to reinstall it in the App Store I am unable to as it says I need to have updated to 10.15.6 or later although I am unable to. I really need to reinstall it as I use it every now and then for editing things so if anyone has any way to be able to download the newest version available for my computer that'd be great. Thanks.
MacBook Air