Am I overthinking this? TRS 3.5mm help needed

I am at my wit's end. I am trying to use the Sony ICD-UX560 to record phone calls from my Samsung Galaxy Note 9 (M# SM-N960U). The MIC-in on the recorder only supports TRS.

I don't want to use a condenser-headset and have to hold the phone over the earpiece. I want to make a phone call, use headphones with a built in mic to hear and be heard and have the recorder capture both ends of the call.

I tried to use a 3.5mm TRS to 3.5mm TRS (basic aux) cable from the phone to the MIC-In on the Sony recorder and then the headphones to the headphone jack on the recorder but it only records their end of the call, not my voice at all. (Headphones are only for audio in the respective port on the recorder)

I then tried to put the headphones "in-line" with a TRS Y-splitter, connecting the male end to the smartphone and then a female end to the headphones. I then connected one end of the 3.5mm TRS cable into the Sony recorder and the other end of the 3.5mm TRS cable into second female connection on the Y splitter. No change. (Probably because TRS Y Splitter won't pickup TRRS headphones)

Because the MIC-In only supports TRS, would it be impossible to connect TRRS headphones anywhere within that line and have it pickup my voice through the built-in mic on the headphones? Is there any workaround?

Would a TRRS to 2xTRS Y-splitter like this TRS Y Splitter work if I used a lapel mic on one side and TRS non-mic headphones on the other and basically just put the headphones in to hear their end and clip the mic to the headphone cable to capture my audio?

Any help would be greatly appreciated.