How to install microg after LineageOS 18 upgrade

I understand the title sounds very basic. But I could not think of a way to describe my question in a short title. My question sort of comes in two parts. 1. Do I actually need to install microg and 2. Now that I have upgraded from LineageOS 17 with microg to LineageOS 18 without microg (by mistake), are there any gotchya's and clarify some instructions from microg's official instructions . Device is OnePlus 7 Pro, in case it matters. My particular case is, I recently upgraded from LOS 17 with microg to LOS 18 without microg by mistake. What I mean by that is, I'm still very green when it comes to flashing ROM's and other android development. I was more nervous about bricking my phone, I was following Lineage's upgrade instructions to the tee. **Here is my mistake**. I used Lineage's upgrade instructions link to the img to download and flash, and not microg's img download like I should have. At first, I honestly didn't notice the difference at all. Microg's settings app was still installed, most apps seemed to work. They popped up a warning or notification about not being able to work without google play services, but allowed me to hit "**Ok**" and continue to use the app. Just the other day, Lineage pushed out an OTA update, and I updated, then that changed. Now I can't use those apps at all anymore at all. They instantly close. So I went to searching for my issue, and basically it lead me to realize, I installed the LOS without microg. So I read their instructions to get an idea of what I should have done. Now I have questions. **Question 1**: The symptoms I'm describing, I do actually need to re-flash the microg img even though I have the microg settings app installed. Correct? I think the answer is "**Yes**". I just want to see if anyone can confirm this or tell me maybe another or better way, since I'm dealing with a non-typical issue. **Question 2**: If question 1 is "Yes" and I do need to re-flash with the microg lineage img. Then it's really a series of questions clarifying microg's installation instructions. Because I'm a newbie and don't understand everything as a more experienced android dev would. - Do I or should I uninstall the microg settings app first? - Since I just OTA updated, I think according to microg's install instructions, I need to wait for another release before trying to flash the microg lineage img, correct? Or would rolling back a version be a better option? - In their *"Migration from LineageOS"* section, I noticed that they mentioned *"...you can't directely flash our ROM on top of the official LineageOS while keeping your data..."*. So I can't keep my personal data, or installed apps, pictures, music, etc? Is this correct? If so, is there any way to back it up, and re-install after I re-flash the microg img? - In their install docs, they also say *"If you have installed unofficial builds of"*, and in that list, I think I have almost all of them. But I don't think they are *"unofficial"*. F-Droid should be from their github, and all the rest I think were installed from my last microg installation prior to the upgrade I just made. I honestly don't know if they technically still installed or not given my apps crashing which need google play services. As I mentioned the microg settings app is still there. I don't even know how to verify this. I will say, after having these troubles and poking around, I have noticed that they mention in the *"Post-install"* section that by default MozillaNlpBackend and NominatimNlpBackend are both plugins which are installed by default. And *"If you want to use these plugins, go to microG Settings -> UnifiedNlp Settings, configure and enable both"*. Even though I have the mocroG settings app installed. That *"UnifiedNlp Settings"* is just not there in mine. So what do you guys think? Does it sound like this is my issue? That I don't have microg installed even though the settings app is there? And are there any special things I need to do before trying to re-flash the microg lineage img?