Canberra is gearing up to play in its A-League Women's elimination final against Melbourne Victory on Saturday, but the match could be the club's last if they lose to their opponents.
United's owners Capital Football have said they will step away from the club next season because it is not financially viable, despite the ACT government pledging to fund the team for the 2026/2027 campaign.
Without an owner, Canberra will fold at the end of the ALW season, landing a major blow to the code and the club's hopes of securing an A-League Men's side.
The A-Leagues' governing body, the Australian Professional Leagues (APL), has kept men's teams afloat, such as taking over the Central Coast Mariners in January and Perth Glory in 2023.
When asked if she thinks the APL should step in to save Canberra while it finds a new owner, the Matildas striker offered an unequivocal "yes".
"As a group, as a player, we're not going to be waiting around like we did last year. This is our profession. This is our careers that people are toying with at the moment," Heyman said.
"If we don't know by the end of our next game, then Canberra might not even have players to come back to.
"If the A-League really doesn't want us, then I assume players will have to walk, because it's our career path, and we've got to continue to play football."
United had been optimistic about finding new owners in previous years, but Heyman admitted her hope was now "long gone".
The 37-year-old said she had spoken to ex-players about buying the club, having won two championships with them since joining in 2010.
"I will continue to do everything to fight for this club, to be the voice for the club, and put everything that I have towards this club, because it's given me the platform to be the footballer who I am today," Heyman said.
"All of Canberra knows how frustrating and upsetting it has been for the last couple of years."
Heyman is also looking ahead to getting back into the Matildas squad ahead of next year's World Cup, after missing their friendlies against Kenya and Malawi earlier in April.
"I didn't get as much game time during the Asian Cup. So I had to do what was best for myself ... stay home to work on my fitness and improve," Heyman said.
"For me to go to the next window in June, I'm just going to continue to push and continue to train hard."