Back in August 2020 the Sony a7S III camera was delayed and now it is delayed again:
Notice and apology regarding product supply of digital single-lens camera α7S III
Thank you for your continued patronage of Sony products.
Due to production reasons, it may take some time before the product is delivered for the digital single-lens camera α7S III.
We are currently making every effort to meet the needs of our customers, so please wait for a while.
We deeply apologize for any inconvenience caused.
Check the Sony a7S III availability at: Adorama | B&H | Amazon | WEX | Park Cameras | Calumet.
Source: Sony Japan