grub2 - Dual boot in different hard disks. Is that a problem?

today i installed ubuntu 18.04 alongside windows 10. The problem is that although windows 10 is installed at nvme(512gb), when i was installing ubuntu i was only able to use my second hard drive which is an a ssd(256gb). I think that happened because installer was seeing that my windows bootloader was installed at ssd(thats impossible because i added the second hard drive after i had done windows 10 installation). So now windows 10 is at nvme, and ubuntu and grub at ssd. Is there a problem with that? is this making booting slower? Should i do something?Thanks in advace