This app was mentioned in 4 comments, with an average of 1.25 upvotes
On Android for my older ANT+ Duotrap I use a sensor manager app called IPsensorman which lets it connect to Strava etc and also has a sister app called IPbike which can record and display real time data locally (never used it but it seems good if you want that sort of thing), basically turns your phone into a cycle computer. If your Duotrap is a newer Bluetooth one you maybe don't need an app like that, but I'm not sure, it says it also manages Bluetooth sensors
For some bizarre reason Strava refuses to add support for ANT+ speed sensors on Android, even though apparently it will use data from Bluetooth ones or the speed data from Garmins. Cadence will work though. On my phone I had to install and run an app called ipsensorman to get it to detect the ANT+ cadence sensor
You can potentially use another ride tracking app that does use the speed and then import to Strava to get the data but I've never tried it
I did find ipantman. I think it grabs all the data and is shooting for to make it available to other apps. You might reach out to the developers and see if they can tie in the missing pieces. I know that the Pulsometer developer is active with his app.
https://play.google.com/store/apps/details?id=com.iforpowell.android.ipantman
Someone really needs to invent this, there have literally been at least a dozen requests like this, for a simple "data gathering/display" device. You can buy the cheapest ANT+ watch/bike computer you can find which will cover a lot of this, or an older Polar watch (GymLink model) can do this for you also (newer Polars obviously can also, but the post-Vantage release models are all BTLE (no GymLink) and start in the $150-ish range, hence the guidance for an older model like an FT(x) (substitute multiple model numbers in the "X" field), which can be found often for like $30 used (and many have replaceable coin-cell batteries (check for this before buying!!!), thus you aren't buying something that will need a custom battery replacement soon).
I've considered making some sort of Arduino-based data-logger/display for these, for this purpose (a raspberry pi could also work just fine, but I have an Arduino I bought to play with and never have, LOL).
Finally, if you have an Android tablet, you can actually find apps and use the tablet paired via either ANT+ (recommended for simplicity/reliability) or BT, to do this. Heck, a cheap tablet can be bought new for probably less than a modern model Garmin/Polar "cheap" watch, and you get a bigger display!
Here is an app that has been around for years, that literally is just for the purpose of testing/gathering sensor data from these types of things...
https://play.google.com/store/apps/details?id=com.iforpowell.android.ipantman&hl=en_US&gl=US
It's not "pretty" but it's functional and gets the job done! (in case the link gets old/doesn't work, it's "IpSensorMan", I think you actually have to get 2 parts, their instructions will tell you though, one is the "sensor activator/receiver portion, the other is the actual data display application, but it may be all-in one, it's been years since I set mine up).
Good luck!