Solution:1
You can either use
null coalescing operator: {{ $material_details ?? 'second value' }}
or elvis operator: {{ $material_details ?: 'default value' }}
(checks given value is empty or null)
Read on Elvis and Null coalescing operator.
Links:
Elvis: https://en.wikipedia.org/wiki/Elvis_operator
Null coalescing operator: https://en.wikipedia.org/wiki/Null_coalescing_operator