Happy Cakeday

Happy cakeday!

I've cancelled and skipped and my 20% resumed when I continued my membership.

For Humble Bundle, region locks don't mean that "the key you get cannot be redeemed in these countries", but more that "the countries in this list either get a region locked key, or nothing at all". Humble likes to distribute locked keys as much as possible, so if there's a locked key for a certain region, you can almost be sure that this is what that region will get.
For Fanatical it's very similar, namely that if you see that a key cannot be redeemed in some country from the dropdown, it might not actually mean that, but the fact that customers from that country either get a region locked key or have no way to purchase the game from Fanatical. Usually Fanatical are quite lazy and don't like to complicate themselves with locked keys for LATAM, RU/CIS, SEA, unlike Humble. If there's a "Tier 1" countries key (redeemable only in "rich countries": Europe, NA, some Middle East, some SEA like Korea, Japan), then you can be pretty sure that this is what you get as a customer from a non-locked country, and no game (not even a locked key) as a customer from a locked country. But this largely depends on the publisher and Fanatical's business agreements with them, so it depends on the game you're looking at.
With GMG I'm not that experienced because I bought only very rarely from them, plus they don't have bundles these days any more. I can't tell how they manage their region locks.

Bottom line... region locks are far from being a definite science, it's subjective to the store, publisher, bundle history. Don't beat yourself up if you can't sort them out; trust me: no one can.

When you're unsure about locks, you can also check recent bundle history or even the tradables on Barter (some people are nice enough to tag their tradables with a sub id and in some cases with the store too).

For DOOM there are no sub reports in the past bundle threads from Fanatical, and the API shows only a region lock for Russia. Since the store sub doesn't exclude Russia and there's no sub for Russia specifically, we can conclude that it's one of the cases in which everyone receives a WW key but Russia just doesn't have access to the game (they will be able to redeem it though). If you look at the tradables on Barter for this item, https://barter.vg/i/18114/ you'll see that someone tagged it as https://steamdb.info/sub/102996/ which confirms that it's a WW key. Thus, chances are that it's indeed redeemable worldwide.

For ACE COMBAT™ 7: SKIES UNKNOWN, I wouldn't trust the information displayed on GMG. With a USA VPN, according to them the key should be redeemable in LATAM + some SEA + NA + Turkey, and such a mixed region lock doesn't exist. A key being redeemable in Canada and not in USA, or in New Zealand but not Australia is also very weird (as seen when browsing GMG from EU). Thus, we can conclude that what they show there is more or less random.
We can't know for sure if the key bought from Europe is WW or EU locked (can be either one of those). There is no EU sub indexed on SteamDB, but that doesn't mean that such a sub doesn't exist. If I were to bet, I'd say it's something similar to an EMEA key for Elden Ring: https://steamdb.info/sub/1019098/