And also some issues / bugs with the File component need to be fixed first.
I did a lot of tests with the File component on Niotron. It seems to work properly, unlike with AI2 (on the test server).
I have ads component.. Niotron will not allow my application there... Tell me other solution plz
Is it an update or a new app released on the Play Store after Aug 1st, 2021?
Update, not new release
Google said they have detected requestLegacyExternalStorage code in manifest....
So, now I can easily remove that code from manifest. But I just want to be very sure about that. Coz google never give a 2nd chance. So, please help.
Why are you telling us this now?
Then you can update your app with the current AI2 version without any problems (until the end of Oct 2021). There is also no reason to remove requestLegacyExternalStorage from the Manifest, as this is only ignored with targetSdkVersion = 30. (The current AI2 version targets Androit 10 (SDK 29).
See also here:
Thanks for the information
how long wait for sdk 30? please update
Please see the second post.
days ,month .my mood off 
can u tell me why other app builder has sdk 30?like niotron
How is niotron providing SDK 30? When app inventor can't even complete it?
Please ask on that community, they will have the answer
i agree with you all right
No i was asking that because it's confusing because those builder do use app inventor's source code. Or I'm i wrong?
Do they? Seems unlikely given AI2 is not yet targeting API30, other than on the test server... 
You need to ask on Niotron Community if you need to understand how they have done it...
Well let's see if they can answer this question.
Yes, other distros are based on AI2, but also change some things. This is obviously the case with Niotron, because they use a different source code for the File component (than it is currently implemented on the AI2 test server).
Oh i see well that's makes sense. Well then i got my coffee time to wait I guess....