Impact of a child's citizenship application on their parent's visitor visa renewal?

[sk007]

Hi folks,

Me & my sibling are eligible to apply for US citizenship this year. 
Our parent's visitor visa is expiring & they will apply for renewal this year(once the ban lifts).

If both children apply for citizenship, will it have an impact on parent's US Visitor visa renewal?
Is it advisable only 1 child apply & get the citizenship and the other to wait(While parents apply for their visitor visa)?

The end goal is ultimately bring parents to USA & get their citizenship process started while they are in this country.
For this one of the children need to get citizenship first.

Please advise.

[lovely]

Yes, its better if one child applied, you could also end up in 2 approvals for the same person since they treat it as 2 different applications...and take fees for both. Your best bet would be to renew their B1 and eventually apply for COS while they are here.