The only two options I can think of right now are the Rode VMML Videomic Me-L
or the Zoom iQ7
both pricy though. for 50 USD you can get a decent used audio interface and connect a cheap condenser mic plus you will have more connection options. that will be a little less portable though of course.
It’s finicky but I got it to work. It’s very basic and I’m not sure how in got into my midi drawer. $29 https://www.amazon.ca/dp/B00967UN50?_encoding=UTF8&psc=1&ref_=cm_sw_r_ud_dp_9JBQP9956CKPMD3A7KQV
I use something like this: works for various situations: iPad Pro USB C Hub, 7-in-1 Adapter for iPad Pro 2021 2020 2018 12.9 11 inch iPad Air 4 Docking Station with 4K HDMI, USB-C PD Charging, SD/TF Card Reader, USB 3.0, 3.5mm Headphone Jack, Accessories https://www.amazon.com/dp/B087BTVJX6/ref=cm_sw_r_cp_api_glt_i_6GHNDGPK85DZ42MP0ZC7
I use something like this: works for various situations: iPad Pro USB C Hub, 7-in-1 Adapter for iPad Pro 2021 2020 2018 12.9 11 inch iPad Air 4 Docking Station with 4K HDMI, USB-C PD Charging, SD/TF Card Reader, USB 3.0, 3.5mm Headphone Jack, Accessories https://www.amazon.com/dp/B087BTVJX6/ref=cm_sw_r_cp_api_glt_i_6GHNDGPK85DZ42MP0ZC7
Sorry it took so long to get back to you. Yes sadly this is a problem with Cubasis and Inter App Audio. I would suggest using Audiobus and apps that support state saving in inter app audio. Here is a list of some apps that are compatible with audiobus and state saving https://audiob.us/apps/
USB C Hub for iPad Air 2020, CableCreation Aluminum 4 in 1 USB-C Hub with 4K HDMI HDR, USB 2.0, 3.5mm Audio and 100W PD, Compatible for iPad Pro 2020, 2018, MacBook Pro/Air 2020, 2019, Dell XPS 13, 15 https://smile.amazon.com/dp/B081ZLF6BN/ref=cm_sw_r_cp_api_glt_fabc_KVS8DKVNN0EPZCHYPWMN?_encoding=UTF8&psc=1
I use this. Works perfectly