To me, this sounds like loose battery terminals or a failing starter. Especially since its intermittent and getting worse over time.
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Check the ground cables at the frame and engine. Loose, corroded?
2013 Civic Si /// 2019 Pilot EX-L
I had the same problem before and with 1000w of sounds. I had to grab a wire and jump the starter, make sure it's in neutral and ignition on. Always starts that way so I thought it's not the battery. But when I changed the battery it never had that problem again. It just didn't have enough cold cranking amps. Get a battery with good cranking amps and clean and tighten the terminals
I work for a honda dealer. Based on the click it sounds like a starter that is going bad .
I had a similar issue in my 2015. It was intermittent, probably happened twice or 3 times -- the car just wouldn't start. I had the ignition relay replaced and have never had a problem since. Unfortunately I don't remember though if there was a click involved though.
Quick update: Went to Autozone and had them change the battery also cleaned the terminals when installing the new one and checked the grounds to the battery. Started first try no problem but on the second attempt again just a click. I guess I'm going for the starter next
The one thing that makes me wonder if it isn't the starter is the car starts without issue when it doesn't just click. It doesn't sound like it is struggling at all when it actually attempts to start