Fixed it myself. In case this helps others, here's my template, through you'd want to verify the network type and paths match what you want.
<?xml version="1.0"?>
<Container version="2">
<Name>NextPVR</Name>
<Repository>nextpvr/nextpvr_amd64:stable</Repository>
<Registry>https://hub.docker.com/r/nextpvr/nextpvr_amd64</Registry>
<Network/>
<MyIP/>
<Shell>bash</Shell>
<Privileged>false</Privileged>
<Support/>
<Project/>
<Overview>NextPVR TV recording and video player software.</Overview>
<Category>MediaApp:Video</Category>
<WebUI>http://[IP]:[PORT:8866]/index.html</WebUI>
<TemplateURL/>
<Icon>https://hub.docker.com/r/nextpvr/nextpvr_amd64</Icon>
<ExtraParams>--security-opt=no-new-privileges</ExtraParams>
<PostArgs/>
<CPUset/>
<DateInstalled>1695046806</DateInstalled>
<DonateText/>
<DonateLink/>
<Requires/>
<Config Name="Recordings" Target="/recordings" Default="" Mode="rw" Description="Recordings Folder" Type="Path" Display="always" Required="false" Mask="false">/mnt/user/media/recordings</Config>
<Config Name="Buffer" Target="/buffer" Default="" Mode="rw" Description="Live TV Folder" Type="Path" Display="always" Required="false" Mask="false">/mnt/user/appdata/nextpvr/buffer</Config>
<Config Name="Configuration" Target="/config" Default="" Mode="rw" Description="Configuration Path" Type="Path" Display="always" Required="false" Mask="false">/mnt/user/appdata/nextpvr/config/</Config>
</Container>
BurntOC's post in Request: NextPVR template was marked as the answer