Second developer that touched it might be new to the company, or in a deadline, you never know
And in the latter case, at least in my organization, we don’t often have hard “must meet” deadlines, but instead have more self-imposed deadlines that become externalized and concrete when these “deadlines” (aka ship date estimates) are communicated org wide.
So all I can figure to do is give zoom talks, write documentation that’s shared to all developers, and try to encourage coworkers to take the opportunity to push soft deadlines back if needed to pay down tech debt.