Sources I could find:
The Hill: https://thehill.com/homenews/administration/535771-trump-establishes-office-of-the-former-president-in-florida Washington Times (which cites The Hill as its source): https://www.washingtontimes.com/news/2021/jan/25/donald-trump-establishes-office-former-president-f/ Also what's interesting is this press release still refers to Trump as President. Spicy!
Spez: It's customary to refer to former presidents as President, as pointed out by u/arterius2. Thanks!
Sources I could find:
Washington Times (which cites The Hill as its source): https://www.washingtontimes.com/news/2021/jan/25/donald-trump-establishes-office-former-president-f/
Also what's interesting is this press release still refers to Trump as President. Spicy!