I can`t think of a reason, why Škoda wouldn`t allow Tidemand participate in a WRC car with M-sport on those rallys they don`t take part of. Especially with these rumours about Škoda WRC in near future, experience is needed. The biggest issue would probably be that M-Sport wants money, Tidemand and his manager aren`t paying customers.
Also, Ostberg is still working for a competitive WRC in an official team and WRC2 is still just an option.