There are no "global cloud seeding" projects. https://www.usatoday.com/story/news/factcheck/2023/02/28/fac... anything like that would be trivially observed by layperson scientists.
(Also cloud seeding = more rain, drought = less rain)
(Also cloud seeding = more rain, drought = less rain)
Rain 'seeding' can be thought of as offering water already in the atmosphere an excuse to form rain and drop out of the atmosphere. It's about controlling where it rains rather than if it rains.
You don't think weather patterns could shift? It's not black-and-white as "clouds = more rain" - as there's obviously the question of distribution.
Likewise, water vapour in the atmosphere traps more heat - warming the planet; locally of course where there's cloud cover, at least initially, it will be cooler.