Question Handphone can not find bluetooth home theater Samsung HT-J5500K

[junsMaps]

I have a home theater Bluetooth Samsung HTJ5500 K, (bluetooth version 5.1)
after I enter the bluetooth function I want to operate this in my phone,, but on my phone can not detect my home theater bluetooth device,, it also happens with my phone that has high specifications (lg thinq v60)

for the record,, my home theater unit is not mounted FM radio antenna, and I do not use ​

any wireless speaker function on my home theater,, Wi-Fi function still works well without FM antenna cable​

is it because I do not install the FM radio antenna makes the bluetooth network is not detected by my mobile phone?​