1st is i don’t get “Bottom Navigation” 
2) Extension not working Like “BottomBar”,“Bubble Tab Bar”
So Sad Android Builder should Fix it. I want To use Bottom Navigation On My App But I have not get any Bottom Navigation 
If you Didn’t Get how to use Bottom Navigation
Then it’s not Builder issue
It’s Understanding Point
2nd Extension is Made by 3rd Party Developer
Ask them to be compatible with AB
Now Solutions ,
Bottom Navigation Part Contains
Gravity and Other things
Block are also Present in the same bottom navigation and use other 2 as 0 or your predefined Integer value
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So this is the issue right ? have you searched on youtube or the community or in the builder?
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