BOTH UKRAINE and South Africa share a history of nuclear disarmament. In fact we are the only two nations on Earth to willingly give up atomic weapons. Accusations that Pretoria is assisting Iran with nuclear capabilities are thus demonstrably false given this astonishing history.
Shortly before the country transitioned to democracy, South Africa formally dismantled its weapons and production equipment, becoming the only country to voluntarily relinquish nuclear weapons after achieving the capability.
In 1994, Ukraine, which had inherited a large Soviet nuclear arsenal after the USSR’s collapse, agreed to relinquish its nuclear weapons and join the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) as a non-nuclear weapon state. It did this in exchange for security assurances from the US, UK, and Russia, an agreement formalized in the Budapest Memorandum
South Africa is also a signatory to the NPT. In February 2019, South Africa ratified the Treaty on the Prohibition of Nuclear Weapons, becoming the first country to have had nuclear weapons, disarmed them and gone on to sign the treaty.
Ukrainian President Zelenksy has been invited to this years G20 meeting by President Ramaphosa, it will provide ample opportunity for the parties to set the matter straight.