It's lovely to hear that you are planning on coming home for a wedding!
You are correct that at this time heterologous/mixed schedules of vaccines are not included under the indicated criteria for being considered fully vaccinated. We have a previous community post on mixed vaccines
from people in the EU who have similar circumstances. Our advice would be to contact your local embassy
to see if they have any further information. You should also contact your chosen airline to confirm their terms and conditions too.
I hope this helps, probably not the information you had hoped for but please check the embassy for the latest official guidance.