no, in this case where you only have 100k rollover, you can only use it for the 2025 calendar year. If you achieve status naturally then you are left with the MQD conversion or Sky Miles conversion options.

If you have multiple years of rollover then it's not a buffet, you are to use 100k MQM for each year consecutively and then whatecer excess you have are either MQD or Sky Miles conversions.

Eg let's say you have 225000 rollover MQMs and want to extend status. They will use 200k of it for 2025 and 2026 calendar years. Then the excess 25k as MQD or Sky Miles. And, if you'd already naturally earned status for 2025 calendar you can't then use just 100k of the rollover amount for the 2026 calendar year. Or, said another way, you cannot leap frog a year with the rollover banked year option. It's 1 year or more, but all joined together.

You also cannot do it bit by bit. You can't use say 10k excess MQM now as MQD conversion and then later in the year decide how else to use the balance. It's one time.