would Sonos Beam 2 have better lip sync?

Unlikely.  The problem is almost certainly the Samsung TV.  I had similar and the lipsyn was behind the picture no matter what I did.  This was the same on a Playbase (Optical out) and the Beam 2 (HDMI).  I ended up replacing the TV with a Panasonic.  It is a know issue on some Samsung models.

Even with a newer TV like a Samsung Frame? Would eArc not make a difference in your opinion? 

Even with a newer TV like a Samsung Frame? Would eArc not make a difference in your opinion? 

I think you may well be fine with newer TVs. Not seen reported issues here. The TV i had was a 2019 model, Samsung UE40NU7120. 

Have you tried changing the HDMI cable for a different one, on the Blu-Ray player, just in case..?

Also, under Sound / Expert settings, is your Digital Audio format set to Pass-through so the signal goes from the Blu-Ray player to the Beam without any processing by the TV?

Finally, under General / External Device Manager, is Input Signal Plus set to On for all HDMI ports?

I set passthrough on the TV but the Blu-Ray player has its on settings which are PCM (no delay) bitstream unprocessed (seems to use PCM) bitstream convert to DTS (Causes delay) and bitstream convert to Dolby Digital which is my preferred method as it sounds the best but also causes a delay. I did try changing the HDMI but didn’t make a difference. I haven’t yet checked the input signal plus but will do once back from holiday.

i heard eArc can really help with lip sync when set to pass through and i know the Sonos Beam 1 doesn’t support that so that’s why I’m contemplating the Gen 2. 

I can’t speak to the eARC’s ability to help with lip sync, but Bitstream Unprocessed should be the optimal output from your Bluray player as it outputs the sound with the greatest efficiency, also passing through the TV without being processed either, leaving the Beam to do the decoding. 
Presumably from what you said originally, Bitsteam Unprocessed from your Bluray is still out of sync, even with pass-through on the TV?

It seems that bitstream unprocessed on the blu-ray is in sync but when checking the Sonos soundbar it’s only outputting at PCM which sounds like a lower quality 

I’m not sure how any part of that chain could output in PCM if you’ve selected Bitstream Unprocessed on the Blu-ray player and Pass-through on the TV. The only time I see PCM on my Arc is when the broadcast is in PCM 2.0, which is common for terrestrial TV’s SD channels.
You’re definitely playing a Blu-ray when you see PCM?

Sorry for all the questions… 

Hdmi 2.1 made lipsync correction a mandatory feature on eArc, while for earlier versions it was always optional with arc.

It still isn’t a magic bullet to fix lipsync issues, it is a 1 way communication, where the display will send a best estimate delay value to the audio device based on how long it needs to process the video frame.

The display has no idea how long an audio device will actually take to process the audio, which is why it’s a best effort guess coded into the display device software. Manufacturers are aware of the issues with lipsync and perform R&D into trying to find optimal settings for their different hardware and software. It is easier for them to find optimal settings for their own display and soundbar. The number of other manufacturer devices means it’s not realistic to test or try and optimise for everything available.

The simpler the audio stream the faster the audio device can decode it. So PCM is usually quicker to decode than any other audio stream.