Mom Visa renewal and Dad needs Visa, should I apply for visa interview for both of them

USA B1/ B2 Visitor Visa
1

My Mom has US visa which is expired.
My Dad’s visa was rejected 2 times 9 years back.
Its my dream to have them here for few months and show places here.
If I have to get visa stamping for both of them , should I schedule interview for both of them at once like 1-renewal and 1-new visa or
should I schedule only for my dad?
Please help

Thanks in advance

2

I dont see any issue in scheduling them together for their respective visas.