The Veiby link is quite weak imo.
Veiby got kicked from Skoda and then uses Citroen which is maybe the best non-Skoda R5 now, VW is an unknown and Fiesta doesn't really need more PR (and he would have to pay) while Citroen might even pay him something or let him drive for free.

His father is manager for more drivers than Lappi.

Doesn't mean Lappi is not going to Citroen, but don't think Veiby driving the R5 is much related.