Instagram vs Facebook for photographers?

For establishing an online portfolio, is there a preference between Instagram or Facebook?  

5 years ago I was a lot more active on both.  These days, meh.  

I have a FB account, but use it for personal side of my life.  My clients don't have access as I keep the page private.  

Social is all for my private life.  Never used it with luck for work.

I have and use both, but just haven't had tremendous experience with either for getting new clients.  

Only Facebook these days 

I had used briefly back in 2018, however didn't see much impact, so I stop just before the pandemic.  

I use Instagram, Flickr and Facebook.

Instagram is basically just a joke these days. I visit maybe once a week but I'm not really that active since it has little to do with photography anymore... mostly it's idiots freaking out when they throw bottle and it lands upright... or American highway brake check videos. Still it's a free place to get some exposure so why not. I have the two minutes a week to upload something...

Flickr is a lot more photography based and I have gotten in touch with other photographers and been able to share some ideas. Some really great inspiring photos on there too. But as with Instagram I don't spend much time there, maybe once a week to see what's new and perhaps get some composition ideas.

Neither of the above two has brought in any revenue. Just saying. I may give up on Instagram altogether, Flickr still has me looking at others' photos.

Facebook is different. My photos are specifically of my area so FB is the easiest way to connect with the locals and share my work. Whenever I sell a print it's because someone got wind of it through FB. Each of the surrounding towns has it's own group so I post my image to whatever group is relevant. Same goes for the concert photography which I do for free to support the local music scene. I connect with these bands (all within a 30ish km radius of where I live) via FB. I also connect with all the local photographers via FB too, again we all know each to some extent and often bump into each other at photography spots. FB is not too bad imo... pity about all the censorship.

I set up a Facebook page for business side of my photography, however after 2 years killed it.  It resulted in zero business.  I keep my personal page only now.