I regret to inform you that it appears your comment has not aged very well. [0] Especially at the moment when you asked for 'any concrete evidence'.
Facebook and Twitter have censored and in some cases 'deplatformed' multiple accounts as soon as they shared the Biden-Ukraine post. The Twitter CEO has admitted that the handling of this was 'unacceptable' and 'not great' and has been summoned to testify on Oct 23rd 2020 due to this. [1]
They have given it more attention that it should have and it has backfired [2] They have successfully created the definition of the Streisand Effect; once again confirming the previous comment you replied to.
> The rabid insistence that deplatforming doesn't work reeks of wishful thinking rather than evidence-based reasoning.
Are you sure?
[0] https://www.technologyreview.com/2020/10/16/1010644/twitter-...
[1] https://news.yahoo.com/twitter-ceo-admits-handling-ny-013413...
[2] https://www.cnbc.com/2020/10/16/twitter-backtracks-allows-sh...