Hey @Bianka1 - I know you mentioned you wanted us to send an email if we needed more info, but I wanted to reach out here so that our conversation could be found by anyone else that may be interested in this.
It’s very possible I misunderstood what you were asking, but if the components are all on one page, a possible solution would be to use the search function and enter the name of the component you want to change. You’d then be able to multi-select all instances if you needed to change. This only works if the components all have the same name, though (ex: main component is “Rectangle” and instances are “Rectangle 2” or “Rectangle 3” etc.)
Again, let me know if I missed the mark here.