Hello and welcome to the Community, Phil
QuickBooks Online Advanced Payroll supports multiple pension schemes for different employees.
Pensions can be added or edited at any time from the Payroll settings > Pension settings. Once set up, you can then configure the pension settings for each employee by going to their Employee settings > Pension settings.
For further information on the benefits of Advanced payroll, see here. If you have any additional queries, get back in touch below!