Hello,
Welcome. You can try to use the kernel 5.7 binary that I uploaded sometime ago:
https://github.com/wolfallein/clockworkpi-debian/raw/master/bin/kernel/5.7/uImage
Place it on the FAT partition, remember to create a backup of your kernel before copying it. I’m not complete sure that it will work perfectly, but the chances are high. The only problem I see could be the wifi driver that I decided to compile as a module, instead to be built-in in the kernel (it helps to have more stable connection and reliability), and maybe you will have some problems with Lima driver, not sure. You can try, see, and if you are not happy you can use your old kernel.
If you are a bit familiar with compiling the kernel, you can check here (Enabling standby mode using the power key) the topic with all the explanations and how to enable it using the official kernel patch (https://github.com/clockworkpi/Kernel/blob/master/v0.4/52rc4.patch).
Let me know if you need further help.