I need help with iCloud backup
Hello everyone, I have an iPhone 6s 128 GB and recently I had a problem with my device and some apps were uninstalled, as I mentioned in this other thread [Re: How to recover deleted app data?]. I only mentioned Minecraft app, but I noticed other apps and games were uninstalled, for some reason. As more people use my iPhone, someone may have done something wrong and this happened, but I'm not sure.
So, I thought about restoring iPhone with iCloud backup, but I'm affraid this will not restore the lost apps data.
Also, I have some doubts about the iCloud backup that I would like to clarify:
1 - There's only one iPhone backup in iCloud (the latest), or can I choose the backup by date?
2 - Is there any risk of restoring iPhone using iCloud backup and losing my data (photos, videos, contacts etc.)?
3 - What happens to the data from my other apps if I restore the iPhone? For example, what happens to WhatsApp messages sent to me after the last backup, if I restore the device? They will be lost? And what about the data from other apps? What happens to them?
Sorry for the long text, but I really want to try to recover everything I lost. I thank those who can help me, I'm really desperate.
And, sorry for any mistakes in my text, English is not my official language.
Thank you
iPhone 6s, iOS 12.0.1