Do Hex Installer And GoodLock Work On One UI3? 

Try to clear its cache and data, uninstall it, reboot and then install it again.

As far as I know, only way to do it is to apply a plug in that changes the shape of them. One UI 3 got more difficult to work with in the last couple of updates.

@@MyReviews_karkan do you know any plugin which have squared toggles

I just found out that it is disabled in hex installer settings. Go to hex installer app settings and you'll find it disabled by default for some reason, just enable it.. They put "not recommended for all" on it, too.

@@MyReviews_karkan after enabling it will work?

I don't think so :/ Find plug-ins that do it. Most of them are paid, though.

I will work on it. :)

I've already made a video about that

Thanks for the blockada idea. I've had it in my head for a long time, but never thought a lot of people would really care for it. I've been running blockada for over 2 years now and it's phenomenal. I'll work on a video for it. Thanks for the push.