Seems to be working now

.gitignore

@@ -2,3 +2,4 @@ build/
 compile_commands.json
 .cache
 .qtcreator
+vcpkg_installed

CMakePresets.json

@@ -24,15 +24,12 @@
           "type": "FILEPATH",
           "value": "/usr/bin/g++"
         },
-        "CMAKE_PREFIX_PATH": "$env{HOME}/Qt/6.10.2/gcc_64/lib/cmake;${sourceDir}/vcpkg_installed/x64-linux",
         "CMAKE_TOOLCHAIN_FILE": "$env{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake",
+        "CMAKE_PREFIX_PATH": "$env{HOME}/Qt/6.10.2/gcc_64/lib/cmake",
         "VCPKG_TARGET_TRIPLET": "x64-linux",
         "VCPKG_MANIFEST_MODE": "ON",
         "VCPKG_MANIFEST_DIR": "${sourceDir}",
-        "VCPKG_INSTALLED_DIR": "${sourceDir}/vcpkg_installed",
-        "CMAKE_FIND_USE_CMAKE_SYSTEM_PATH": "OFF",
-        "CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH": "OFF",
-        "CMAKE_SYSTEM_IGNORE_PATH": "/usr/include;/usr/lib;/usr/local/include;/usr/local/lib"
+        "VCPKG_INSTALLED_DIR": "${sourceDir}/vcpkg_installed"
       }
     },
     {

proto/CMakeLists.txt

@@ -75,7 +75,7 @@ target_include_directories(proto_static PUBLIC
     ${PROTO_OUT}
 )
 
-target_link_libraries(proto_static PRIVATE 
+target_link_libraries(proto_static PUBLIC
   protobuf::libprotobuf 
   gRPC::grpc++
 )