SIRET and Talent Visa (Family)

Dear all, grateful to find this group. I am the non-EU spouse of a non-EU holder of a Talent Visa (Family) in France. We have been reading the government websites for answers, but so far are not getting clarity on this question:

The reason we came to France, my husband's job, was dissolved. He is now forming a micro-enterprise but we are not sure that he can get a SIRET assigned to him when he is on a Talent Visa. It is unclear when we read the website. Can anyone please shed some light on this situation? Thanks!