What I did was that I sent the link to onedrive to myself by email,opened the email in the email app on my phone,clicked the link , downloaded the touch setting ,then opened the downloaded touch setting in the file explorer and there I was given the option to install it.After installing it I went to settings and I found 'touch ' there in Extras.You can directly type the link in Edge on mobile too ,I suppose.
There may be some other way to do it but I had no problems in this way.