If there is someone opening it? The answer is no, the only way to know that your wallet have been compromised is when they sent your coins or tokens to another wallet, worry about Keeping your private keys safe to yourself only instead of finding tracker that never exists, by the way you can get hardware wallet they have higher grade security compare to mobile wallets and others.
True, there's no way that you will know someone has open your wallet unless you discover it yourself.
Besides going on a hard ware wallet, maybe the best thing to do is really have a security and safety practice so that you can keep yourself away from malwares and hackers. Don't trust anyone with any of your private key or better yet, have a different machines, i.e laptops/pc separate from your crypto activity.