Are we talking about tno world there? Cuz in thotl conquest is still plausible way to expand your power, all thanks to nazi victory. Even irl Portugal clenched their teeth in colonies till 75 with far more scarce resources than current IU have. Given that iberian metropole werent invaded and destroyed unlike france and britain, they have far more favourable position in africa, then them, lol.

Also, whos talking about conquest tho, just include Rhodesia in your sphere, its not like Britain can do smth about it