You need to install these:
go get google.golang.org/protobuf/cmd/protoc-gen-go
go install google.golang.org/protobuf/cmd/protoc-gen-go
go get google.golang.org/grpc/cmd/protoc-gen-go-grpc
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc
go get github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway
go install github.com/grpc-ecosystem/grpc-gateway/v2/protoc-gen-grpc-gateway