Unlikely. Resellers don't do their own specialized electronics manufacturing. They likely do like other resellers and have them contract manufactured or slap their brand on some generic parts.
Ikea isn't just a reseller. And they might not own any factories, but neither does Apple.
In many segments, IKEA acts like apple but there are other segments were IKEA is like Amazon Basics. It just depends if they've the patents/know-how which they can leverage, if yes - act like apple, if no - act like Amazon Basics.
That's actually not how IKEA works at all. Sure, they may not own all the factories but you won't find (parts of) any of their products under other brand names.
A strange claim. You can reliably find white label stuff sold under their brand, just like of any other big company.