Operator '>' incompatible with operand types 'Instant?' and 'Instant?'

[neilbgr]

According to the code on https://dotnetfiddle.net/wTSGW5 (EFCore, net9, NodaTime) comparing nullable Instant (Instant?) fails:

Unhandled exception. Operator '>' incompatible with operand types 'Instant?' and 'Instant?' (at index 6)
   at System.Linq.Dynamic.Core.Parser.ExpressionParser.CheckAndPromoteOperands(Type signatures, TokenId opId, String opName, Expression& left, Expression& right, Int32 errorPos) in ~\Parser\ExpressionParser.cs:line 2528
   at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseComparisonOperator() in ~\Parser\ExpressionParser.cs:line 647
   at System.Linq.Dynamic.Core.Parser.ExpressionParser.ParseLogicalAndOrOperator() in ~\Parser\ExpressionParser.cs:line 446
  ...

After reading source code, I've found a clue in IRelationalSignatures interface.
As temporary workaround, in a local fork, I've added a package ref to NodaTime and this few lines :

using NodaTime;
using System.Diagnostics.CodeAnalysis;

namespace System.Linq.Dynamic.Core.Parser.SupportedOperands;

[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)]
internal interface IRelationalSignatures : IArithmeticSignatures
{
    ...
    void F(Instant x, Instant y);
    void F(Instant? x, Instant? y);
}

I known is not the solution, but it works (!) and I need a workaround so I'll use this ugly patch while there is not good public solution.

So my question is: will it be possible to handle comparable types and, above all, comparable nullable types?

Thks