You can try using an online rar to zip converter website so you can open it, that's what I always do when it comes to rar files.
dokidokiiii
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A member registered Jan 15, 2023
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You can use an online rar to zip converter website if you want to convert the rar file to an openable zip file so you can use gacha art and other apps that come in a rar file. I personally use https://cloudconvert.com/rar-converter as it is the best converter I've come across so far.