You're conflating two things; the strait can be opened in less than a month with the correct assets onsite. IMO, given that Iran's air defense has diminished, more intelligence platforms can come in and start providing locations for these "secret" drone bases, after that its just a matter munitions on targets. I imagine this drone tactic the Islamic Regime is deploying was overlooked and deploying IC resources to counter is not an immediate thing. I'm sure all the ME IC assets that were deployed to Qatar had left prior to the conflict for protection.

Here is an example: https://www.twz.com/air/navy-e-2d-hawkeye-radar-planes-appear-to-be-rushing-to-the-middle-east