generative background extend

hello everyone

i have videos of my jewelry spining on a turntable.

after all the editing and cutting and croping, my video does not fill in the entire background, and it moves around.

attached is a very brief sample 

- is there a generative ai tool in premire pro that will extend the background to fill in the empty space?

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is there an ai tool that will keep my jewelry centered at all times while it is spining?

i know the manuel way of setting up point and slowly moving it every few frames.  but it takes a lot of time

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i am really a beginer and a self thought premier-er

so i dont know many of the tecknical stuff.  so please be patient with me

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