Problem with data transfer speed of external ssd drive SanDisk Extreme Portable SSD

Hello. I have a SanDisk Extreme Portable SSD SDSSDE60-2T00. Here is the link to the specification https://www.westerndigital.com/en-in/products/internal-drives/sandisk-extreme-usb-3-1-ssd?sku=SDSSDE60-2T00-G25. It is equipped with a USB 3.1 Type-C connector and also includes a USB Type-C to Type-C cable and a Type-C to Type-A adapter. No matter how it is connected to my iMac 2020 27" with the Sonoma, via USB C or via a USB A adapter. The read and write speed is no more than 15 MB/s. If I run Windows 10 via bootcamp on the same iMac, the disk speed will be 350-550 MB/s, including on the apfs partition. From this I conclude that the problem is not in the hardware, but in the software, namely in the new version of MacOS, because When I started using this drive I was running macOS Big Sur and had no such problems. Does anyone have any ideas how to fix this? I've seen a lot of similar threads where people suggested that the drive needs to be formatted or the cable needs to be replaced. But, with the same cable, on the same computer, the disk works at high speed, but not in MacOS. And when connecting to another computer on Windows, the speed is also high: 350-550 MB/s. If I connect the disk to the iMac via the cable that comes with the iPhone (usb-c to usb-c), the disk speed increases to 40 MB/s, but, as I understand it, this is due to the fact that the cable only supports USB 2.0. And even in this case, the speed is higher than through the original usb 3.1 gen 2 high-speed cable. I bought another usb-c to usb-c usb 3.1 gen 2 cable, and the speed is absolutely the same, in Mac OS.