Did anyone managed to get PSResourceGet working with a PowerShellGallery mirror on Sonatype Nexus OSS?

[OCram85]

We really would like to migrate from PowerShellGet v2 to PSResourceGet for these 2 use-cases:

• Using an internal Repository for own PowerShell modules (NuGet v2 based)
• Using a PowerShellGallery Mirror for a centralized internal endpoint for external modules.

Up to now I could deploy these repos by grouping them like this:

Register-PSRepository -Name 'Nexus' `
  -SourceLocation 'https://nexus.ocram85.com/repository/PSGroup/' `
  -PublishLocation 'https://nexus.ocram85.com/repository/PSModulesRepo/' `
  -InstallationPolicy 'Trusted' -Verbose

But querying the PowerShellGallery mirror with FindPS-Resource doesn't work fully. When searching for module like 'Pester' it returns the wrong elements:

Register-PSResourceRepository -Name 'Nexus' -Uri 'https://nexus.ocram85.com/repository/PSGallery' -Trusted -Priority 10 -ApiVersion v2 
Find-PSResource -Name Pester -Verbose -Repository 'Nexus' -Debug                                                                                 
---
DEBUG: In FindPSResource::ProcessResourceNameParameterSet()
DEBUG: Filtering package name(s) on wildcards
DEBUG: In FindHelper::FindByResourceName()
DEBUG: Parameters passed in >>> Name: 'Pester'; ResourceType: 'None'; VersionRange: ''; NuGetVersion: ''; VersionType: 'NoVersion'; Version: ''; Prerelease: 'False'; Tag: ''; Repository: 'Nexus'; IncludeDependencies 'False'
DEBUG: Searching through repository 'Nexus'
DEBUG: In FindHelper::SearchByNames()
DEBUG: No version specified, package name is specified
DEBUG: In V2ServerAPICalls::FindName()
DEBUG: In V2ServerAPICalls::HttpRequestCall()
DEBUG: Request url is 'https://nexus.ocram85.com/repository/PSGallery/FindPackagesById()?id='Pester'&$inlinecount=allpages&$filter=IsLatestVersion and Id eq 'Pester''
DEBUG: Found package 'Pester' version '3.0.3'
DEBUG: Package 'Pester' returned from server
DEBUG: Package 'Pester' was previously discovered and returned

Name   Version Prerelease Repository Description
----   ------- ---------- ---------- -----------
Pester 3.0.3              Nexus    Pester provides a framework for running BDD style Tests to execute and validate PowerShell commands inside of PowerShell and offers a powerful set of Mocking Functions that allow tests to mimic and mock the functio…

Did anyone tested using Publish-PSResource to upload PowerShell module to such a repository? - Does nuget v2 still work?