Lost File, HELP

It’s a long shot but does SketchUp Web save any back up files on the local computer? My son created an entire model of his project to become an Eagle Scout on SketchUp web and it is no where to be found in his account. I have always been a desktop user don’t know the in and outs of the web version, not having much faith in it right now LOL.

Tried looking in various account that’s could have been logged onto by mistake, mine, his mothers, ect. Couldn’t find it any where.

Does it automatically save as you are drawing? Wondering if he saved it at all, but I am 99% sure that he did.

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Look on Trimble Connect as shown in the screen shot.

Yes I did look in Trimble. Lots of his other projects are in there but not the one we need.