Collaboration often poses challenges when individuals do not engage as anticipated. it is important to approach the conclusion of such projects with a positive and constructive mindset. The matter of authorship and the sequence of authors can become ambiguous, particularly in inter-institutional collaborations.

Science fiction author Larry Niven once said at a convention panel:

"A collaboration is a case where two authors each do 90% of the work." (see https://academia.stackexchange.com/questions/191158/how-to-sustain-and-realize-a-collaboration#:~:text=SF%20author%20Larry%20Niven%20said,do%2090%25%20of%20the%20work.)

Given this perspective, my recommendation (though it's more of a suggestion than a definitive answer, as it might be subjective) is to wrap up the paper without further waiting for co-author input. Submit it with all three of your names, and if your contribution was significant, you could rightfully claim the position of the first author.

Collaboration often poses challenges when individuals do not engage as anticipated. it is important to approach the conclusion of such projects with a positive and constructive mindset. The matter of authorship and the sequence of authors can become ambiguous, particularly in inter-institutional collaborations.

Science fiction author Larry Niven once said at a convention panel:

"A collaboration is a case where two authors each do 90% of the work." (see https://academia.stackexchange.com/questions/191158/how-to-sustain-and-realize-a-collaboration#:~:text=SF%20author%20Larry%20Niven%20said,do%2090%25%20of%20the%20work.)

Given this perspective, my recommendation (though it is more of a suggestion than a definitive answer, as it might be subjective) is to wrap up the paper without further waiting for co-author input. Submit it with all three of your names, and if your contribution was significant, you could rightfully claim the position of the first author.