Minimum wage has been around since 1938, far longer than the average minimum wage worker had any realistic concerns about automation eliminating their job. On the contrary at the time and for the most part since then, the increase in production levels saved jobs, caused growth of the particular companies implementing the automation so they hired more employees.
Tech cannot entirely replace labor any decade soon. You could hand pick some repetitive task, but few minimum wage laborers are doing that simplistic a task and no other tasks, so it would require several robots or fewer very expensive ones. The average skill set of a minimum wage earner would rise to deal with this environment, with an associated higher training cost for employers, but then the employers would have more invested and an incentive to pay a little more to decrease employee turnover rate.
We are long past the point in tech where we could make a robotic arm to dip fries, but robots are suited more for production work at high speed, not periodic and variable tasks. If McDonalds was turning away customers because they couldn't hand out fries fast enough, the hundreds of thousands of dollars to automate the whole system and thousands more in maintenance and repair might make more sense. You still wouldn't be able to get the robotic fry arm to mop the floor or kick a heroin junkie out of the restroom, pick up trash in the parking lot, etc. They already have the level of automation that makes sense with a machine dipping fries into the oil, timing it, and extracting them... at least I know some restaurants use them and would assume McD does too.