Depends if you are looking for a Sean Connery in the first place - I don’t think that is the case any more. The Connery benchmark has been considered as the gold standard of Bond. But trying to follow it has shown to be more restrictive than helpful.
Today, you would first look at acting abilities, charisma and presence - not trying to find some chap who happens to resemble Connery in one or two departments, simply to find him wanting in the end anyway. If you’re looking to recast you need to find an actor whose presence and range can incorporate everything from charming to dangerous, from ironic to serious, depending on the particular direction you want the next Bond to take.
And once you found that candidate you open your eyes, that’s how easy it is.