IHG already said it would only extend certs issued in 2021. Those certs expire on 12/31/21 are certs issued in 2020, and already extended twice. Their team already confirmed on twitter the official policy posted on IHG site.
Dont forget IHG gave certs issued in 2020 an 18 months expiration dates. Those will not be extended.

Certs expiring in 2022 that are ssued in 2021 - they are extended to end of 2022. We saw our 2 eligible certs extended. Non-eligible certs in our accounts are those issued with 18 months expiration dates which range from Mar 2022 to Sept 2022 - they stay at their original expiration dates.

I used my uncapped cert in Paris in late October. Last week we used one cert expiring Dec 31, 2021 in each of our accounts.

If you are fully vaccinated and have a booster shot, I honestly dont see why you cannot safely travel / dine in restaurant.