I think there won't be enough willing to actually strike. (This is an opinion.)
The International has to issue a strike vote before taking any action. The last several were overwhelmingly passed even with only 20% bothering to turn one in, it is just a tool used by the union negotiators in order to a better Contract. On the Company side they do not want even a hint of a work stoppage particularly with the ways things are going now, they are currently sitting pretty with the constant growth and profits.
They can easily afford to give us a fair and equitable Contract with no concessions added, they had their way with the Hoffa administration and pretty much got what they wanted. The big feather in their cap was the final settlement of the Central States underfunding in 2008 and the recently with the federal bail out.
Back in 2013 they wanted out of administrating the Health and Welfare Plans trying to save money out of fear of rising healthcare rates with the Obamacare mandates. It did not happen and the Union sponsored healthcare providers were more than happy to get those extra dollars and new members.
I do not see any reason for both sides to go past the 1 August 2023 deadline, I could be wrong on this but I believe that this one will be settled way before that date.