I would be calling my local support for this;
When you have an IB account and want another IB account, this certainly can be done. From IG to IB I don’t know. But you can make screen copies of all the settings, obviously.
Your Autotrading Strategies, Indicators and Screeners can all be exported to a folder by you and you can import them again on the “other side”.
The more interesting question could be whether your complete IG environment can be / will be pertained after your IB environment has been created, because (you may not know) you will get an IG account for free with your IB account (for free = when you apply 4 IG trades per month). Thus, no use to set that all up again if you’d want that anyway.