Short answer: Yes. This is possible on Kota.
Simply open Kota's mobile app and enter the Retirement section. Tap on the 'Change contribution' button, edit the personal contribution percentage to your preference, and confirm.
Example of a contribution change for Irish pension schemes
Example of a contribution change for UK pension schemes
This will be effective from your next payroll. Please note: it won't impact any contributions already paid to the pension pot and they cannot be refunded.
For UK pension schemes, please bear in mind that a total of 8% contribution (employer + employee) is due every month. You can only edit your contribution whilst ensuring these parameters are still met. If you'd like to decrease your pension contribution lower than this, it is possible in some cases to pause your pension contributions. Read more here.