I would like to update my Huawei Honor 6x to Android 10 but from the updates I don't have any recent available just the current version which is Android 7 that is not compatible with many apps
Yes to update to Android version 10What you want to achieve is to UPGRADE the existing Android OS what can't be done by means of Hisuite tool.
Yes upgrade to Android 10You are highly recommended to carefully read posts: Update is a patch to an existing OS, upgrade is a replacement of an existing OS with a newer version.
It doesn't say Honor 6xYou can't upgrade this phone: That's what Huawei already published in 2018