The way you phrased the question is complicated. The spousal benefit is 50% of the other spouse's benefit.
For a spouse who turned 62 before 2016:
If they applied for a benefit on their own record, they could re-apply at full retirement age for their spouse's benefit, but it would only make sense to do that if 50% of the spouse's benefit was more than 100% of their own benefit.
For a spouse who turned 62 in 2016 or after, their application was automatically deemed to be for both programs, and they should automatically be receiving 100% of their benefit or 50% of their spouse, whichever is larger, but not both.
