netstandard 2.0 build depends on Microsoft.Bcl.Memory causing conflict with Indexes provided by IndexRange

[caspChristian]

Which version of Microsoft.IdentityModel are you using?
Microsoft.IdentityModel.Tokens 8.3.1

Where is the issue?
Microsoft.IdentityModel.Tokens 8.3.1 netstandard 2.0 build Depends on Microsoft.Bcl.Memory

Is this a new or an existing app?
Existing app, Api .Net 4.7.2, working fine with Microsoft.IdentityModel.Tokens 8.3.0

Repro
Using IndexRange to provide support for language features of index, especially

var aList = someArray.ToList();
string last = actions[^1];  // <<<<<

Also see bgrainger/IndexRange#14

Expected behavior
Everything compiling without issues, and no major change since it is only a minor version change. (trying to be optimistic at times)
(Also wouldn't expect Microsoft.Bcl.Memory to break IndexRange usage, but that might be a more difficult issue to resolve.)
Change of package use would be nice to have in release notes with explanation.
Introduced in #2817

Actual behavior
Compile time errors

CS0656 Missing compiler required member 'System.Index..ctor'
CS0518 Predefined type 'System.Index' is not defined or imported
CS0518 Predefined type 'System.Range' is not defined or imported

Possible solution
Is Microsoft.Bcl.Memory required as a dependency in netstandard builds?

azure-activedirectory-identitymodel-extensions-for-dotnet/src/Microsoft.IdentityModel.Tokens/Microsoft.IdentityModel.Tokens.csproj

Line 68 in 658604a

<ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net9.0'))">

<ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net9.0'))">

Current workaround
Block version 8.3.1 and later