Here is the list of some white label banking solutions sorted by region.
EU: Salt Edge, BackBase, Strands, Meniga, Innofis
Australia: The System Works Group (TSWG), Sandstone
US: Geezeo, Malauzai, MX, Fiserv, D3Banking
I'm working for Salt Edge (specifically on the white label banking part), so if you'd like to learn more about what we offer, you can check our web: https://www.saltedge.com/products/finext or contact me directly at firstname.lastname@example.org
Hope it helps