You have 2 options:
Pension Form 12
https://assets.publishing.service.go...PS_Form_12.pdf
This will give you a once yearly FREE pension forecast that should cover your Regular pension and also your new FTRS pension. Be aware, that the McCloud roll back is default for everyone and for some they are better off not rolling back. You’ll need to get the RSS statement to understand the roll back effects. This form is also available for electronic submission if you have a MODnet account. Expect it to take about a month to come back.
Pension Form 14
https://assets.publishing.service.go...PS_Form_14.pdf
This is for requesting a forecast of your preserved pension on retirement.
Good luck and check your sum carefully