It's possible that they explored all acquisition possibilities they could find without the world knowing about their situation, and that the only company or companies who could reach acceptable terms to acquire them didn't have the network links to find out that Bench was acquirable until the news broke that they were shutting down.
Obviously not an ideal situation, both parties (if an acquisition is indeed happening) would prefer to have been able to do it before Bench's announcement, but there's simply no way to let every single person & company in the world who might consider acquiring them know what's on the table without the information being public knowledge too.
NDR (Net Dollar Retention) in a business like this is the key metric for determining whether there's a business or customer base worth acquiring here. With Bench's rumored churn in recent years, their existing investors which includes top funds like Bain and reputable ones like Inovia (which is top Canada) would've had the opportunity to invest first. Clearly they didn't.
With a rumored 2024 revenue of $54.9m in 2024, and peak valuation at $230m+ (4x Rev which isn't unreasonable to pay even for a tech-enabled services business), churn would've been really bad for this deal to end up here.
I'd suggest deleting it and not continuing this strategy, as I suspect I'm not the only HN reader who will react to your comment by making a mental note that 'Digits' is a company with annoying marketing.