The Belgian authorities have published an official communication concerning extension of the temporary authorizations that were granted during the initial weeks of the outbreak of corona virus.
Products with a temporary authorization that contain an AS that is still under national transitional law are automatically extended for a period of 180 days. A second extension of 185 days can be granted for products when it can be proven that a new registration request for this product has been submitted.
If the AS is already approved on BPR level an automatic extension is again granted for 180 days. If you have submitted a European authorization request under the BPR the authorities ask to share this information, so they can withdraw your temporary authorization the moment your BPR authorization is granted.
The information can be found here, but note that for the moment it is only available in Dutch.