Dahlskjaer incorporated Freenode Limited in August 2016, contacted Lee about a possible acquisition in March 2017, and finalized the sale in April 2017. That's hardly immediately, and evidence to support Lee's involvement with the incorporation isn't currently public.
> Escalation in April
Before any of these events, Lee's long held access to freenode's DNS account was revoked and requests for that to be reverted were declined, along with threats that staff would quit if the revocation was not honored.
> A week after Lee's effectively public announcement of ownership and de facto dictatorial operation of Freenode, the staffers who resigned from Freenode created Libera.chat as a replacement.
Libera Chat was created April 23rd, before any control was transferred to Lee, 5 days after Fuchs' post and 7 days before the testnet was shutdown. It was only publicly announced on May 19th.