Could be the sukkot blessings but it seems the IHG-milestones F&B vouchers are redeemable,
all within easy access of the app for apple users,

i will try these out at Voco The Hague / IC AMS / Kimpton AMS / Kimpton London and will report back:

screenshots

step 1
in IHG

step 2
go to account

step 3
to rewards wallet

step 4
this is what you'll see:



Click details and it will list all the fine print





step 4
I guess you need to be
- checked in the hotel
- booking under same IHG-rewards account full name
- have membership in the system and tacked on reservation
* better to ask at reception if all requirements are fullfilled
- eat / drink at hotel's own operated venue (indication is that you sign bills to room charge on hotel folio)


* i think if you can connect to the hotel's own wifi under your IHG account number the chances are that the system has your reservation + checkin + membership number all confirmed and should pose no deterrent from using the F&B vouchers.