Convert easily from worldspace to find cartesian co-ordinates for the tiles in your isometric grid. You can build on this to handle things like movement, finding neighbouring tiles etc. Also basic highlight selection on tile.
Not the only way to do this but it's useful for starting out with isometric grids.
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iOS - https://apps.apple.com/tt/app/ammo-ru...
Android - https://play.google.com/store/apps/de...
On this page of the site you can watch the video online Unity Isometric grid selection and cartesian conversion - Tutorial with a duration of hours minute second in good quality, which was uploaded by the user Little Arch Games 05 June 2022, share the link with friends and acquaintances, this video has already been watched 2,712 times on youtube and it was liked by 37 viewers. Enjoy your viewing!