Phubbing, it's ruining my relationship

My partner gives more attention to his phone than our relationship. It's beginning to create distance between us and it makes me very sad. I work all day so my evenings are the times I get to spend with him. He is retired (over 50) and does his own thing during the day which is his hobby or working outside but mainly on his phone looking at facebook or tiktok for long periods.

We will spend about 5 minutes chatting when I get home but then he will get his phone and starts scrolling right infront of me and won't say a word for ages. I'm sat like a lemon until I realise the conversation is over.

This will happen often during the course of the evening, even watching a film together he would rather disappear into his world on his phone and leave me watching TV. Its so lonely for me having him sat next to me but not present emotionally. Other people's lives on social and seem to be far more interesting than sharing time together and watching random strangers on tiktok seems to be his new friends.

Bedtime again is getting difficult for me as the phone joins us. He is staring at it as I get into bed and he will be smiling away at some videos. Good night kisses are rare and the build up to being intimate non existent.

I have spoken to him about this a couple of times and i just get excuses from him about it being a habit from being single for so long and he sees it as not a big deal and I'm made to feel bad about mentioning it.

I really don't know what to do about it now. I did start leaving the room each time he did it but he doesn't seem to mind, he thinks I'm having space to myself which is the opposite! I want to connect and engage with him as I've not seen him all day.

Any suggestions on how I tackle this, telling him only causes resistance.