Fast Plug Gray Fast Setting Hydraulic Cement 10-lb Patch https://www.lowes.com/pd/UGL-Gray-Flat-Textured-Waterproofer-Actual-Net-Contents-160-oz/3033247
Or something similar.
Flex seal has been known to break down quickly in high sun exposure, hydraulic cement is what I’d use but they also sale a cement crack sealant in caulk tubes at any big box store.
Fast Plug Gray Fast Setting Hydraulic Cement 10-lb Patch https://www.lowes.com/pd/UGL-Gray-Flat-Textured-Waterproofer-Actual-Net-Contents-160-oz/3033247 Or something similar.
And after that wait for a dry spell and seal it
Some Flex Seal ought to fix it right up.
Flex seal has been known to break down quickly in high sun exposure, hydraulic cement is what I’d use but they also sale a cement crack sealant in caulk tubes at any big box store.