Flutter: Listview inside TabBar not showing - flutter

My "ListView" not showing inside "TabBar".
drive.google.com/file/d/1MLB7oizJ468V1SmCO_IsjL6OaoGhUAPd/… ----- List Page Code
drive.google.com/file/d/1d-iRa14-DupdLo3QdHd_iCHFkGi-_HD6/… TabBar Code
"TabBar" Section code:
"ListView" section code:

First of all the question is unclear and you should also provide code so that we can replicate the issue at our end.
Secondly, as per my understanding you are using NeverScrollableScrollPhysics() in both your TabBar() and your ListView() which is hindering the ability of your ListView to scroll. It is visible as I can see in the Substitutes section but it is not scrolling is your issue I imagine.

You can use https://pastebin.com to share your code. Never use such kind of drive link. This is difficult for a developer. They first need to download the code in order to debug. Also, share images to describe your issue.

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like this
But when I hold the screen and scroll above then the top content is displayed like this
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I hope I made senseI cant attach a video here to describe it more accurately.
Here is the link for the respective file associated with the screen,you can download it to check out the code:
The mobile app UI code starts from line 876.
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I haven't executed your code because it depends on lot of your other files but from reading your code I think the problem is occurring because of extendBodyBehindAppBar of Scaffold. (Checkout line number 114 in given file). Removing this argument or setting it to false should solve the problem.
From the docs :
If true, and an appBar is specified, then the height of the body is
extended to include the height of the app bar and the top of the body
is aligned with the top of the app bar.
This is useful if the app bar's AppBar.backgroundColor is not
completely opaque.
This property is false by default. It must not be null.

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I viewed this post and had a try, and it works.
Cheers!
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