In the journal they says words like sus and pog and they're going to school in person so that implies that it takes place post quarantine so early 2021 at least
Based on this "What humans call Overkill | HFY | A short Sci-Fi Story" story shows Humanity's civilization is an intergalactic force of nature that exerts total control over at least 27 galaxies & present in at least 1,722 galaxies in some form with some estimates place them at over 10,000 galaxies under their influence. AKA a type 3 civilization a hundredfold.- https://www.reddit.com/r/HFY/comments/18avh1i/what_humans_call_overkill/
Also has Youtube version- https://www.youtube.com/watch?v=Teis4Evc7tU
As in 2:02 to safe not just the US but the rest of Humanity on 21st century Earth from Andrias+Core during 2020AD "Frog-vasion".- https://www.youtube.com/watch?v=0kQ8i2FpRDk&t=4s
How do you envision a potential United States invasion of Amphibia? - https://www.reddit.com/r/amphibia/comments/17ywq18/how_do_you_envision_a_potential_united_states/
How To Escape The City (Urban Evasion While Being Hunted) by Garand Thumb- https://www.youtube.com/watch?v=_f-0GRismLg&t=7s
Do you think Sasha joined the US Military or UN Peacekeepers before becoming psychologist? (I mean she was the 1st Lieutenant of the Toad Army and Resistance fighter, pretty sue Mr X wouldn't let all that experience go to waste?) - https://www.reddit.com/r/amphibia/comments/179tf3v/do_you_think_sasha_joined_the_us_military_or_un/