This phrasing is so weaselly you baited me into fact-checking it. Congratulations!
on track to
meaning it's crediting Biden with things that haven't happened yet? I didn't investigate how many future acres he needs to make this meme true.
more land ... first-term persident
The Pacific Remote Islands are much larger, but mostly water. Created by Dubya, expanded by Obama, both times in their respective second terms.
modern
Personally, I'd have counted Carter as modern. His Alaska Conservation Act weighed in at 157 million acres. I think that one got Congressional approval too, so maybe they're only counting land protected by executive fiat.