AIQ UM 9.8 now has what's called "Fix its" - meaning, you'll see notices of issues on the dashboard with the option to fix them.
This includes "out of inodes":

When you click "Fix it":


In my case, since I am very close to full on the inodes, it registers "failed" for the action, even though it increased the inodes. That's because 2% didn't get me below the 90% threshold:


ontap9-tme-8040::> vol show -vserver DEMO -volume FG_SM_400G -fields files,files-used
vserver volume files files-used
------- ---------- -------- ----------
DEMO FG_SM_400G 13107152 13063024
ontap9-tme-8040::> vol show -vserver DEMO -volume FG_SM_400G -fields files,files-used
vserver volume files files-used
------- ---------- -------- ----------
DEMO FG_SM_400G 13369268 13063026
But in most cases, "Fix It" would be done before you ran out of files (warnings kick in at 80%).
12/17/2020 17:20:35 ontap9-tme-8040-01
ERROR wafl.vol.runningOutOfInodes: The file system on Volume FG_SM_400G__0001@vserver:7e3cc08e-d9b3-11e6-85e2-00a0986b1210 is using 80 percent or more of the files that can be contained on the volume.
In my case, I'd need to go to the CLI or GUI to resolve this manually.
We cover AIQ UM 9.8 in this podcast:
https://community.netapp.com/t5/Tech-ONTAP-Podcast-Episodes/Tech-ONTAP-Podcast-Episode-271-NetApp-Active-IQ-Unified-Manager-9-8-Updates/ba-p/161706