It seems that level-zero stop building on i386, see:

In file included from /wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/checkers/certification/zel_certific
ation_checker.cpp:9:
In file included from /wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/checkers/certification/zel_certific
ation_checker.h:18:
In file included from /wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/ze_validation_layer.h:23:
/wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/../../utils/ze_to_string.h:132:20: error: redefinition of
 'to_string'
  132 | inline std::string to_string(size_t value) { return std::to_string(value); }
      |                    ^
/wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/../../utils/ze_to_string.h:125:20: note: previous definit
ion is here
  125 | inline std::string to_string(uint32_t value) { return std::to_string(value); }
      |                    ^
/wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/../../utils/ze_to_string.h:166:20: error: redefinition of
 'to_string'
  166 | inline std::string to_string(const size_t* ptr) {
      |                    ^
/wrkdirs/usr/ports/devel/level-zero/work/level-zero-1.28.6/source/layers/validation/../../utils/ze_to_string.h:141:20: note: previous definit
ion is here
  141 | inline std::string to_string(const uint32_t* ptr) {
      |                    ^
2 errors generated.