diff -r c4f923017349 -r a0d61ac3719e include/dolfinx_access/minmax_p2.h
--- a/include/dolfinx_access/minmax_p2.h	Mon Jun 29 00:20:42 2026 +0300
+++ b/include/dolfinx_access/minmax_p2.h	Sun Oct 04 13:02:26 2026 -0500
@@ -8,6 +8,9 @@
     extern CoordValuePair max_Function_f64_p2(Function_f64 const* f);
     extern CoordValuePair minmax_Function_f64_p2(Function_f64 const* f, bool max);
 
+    void cell_dofs_Function_f64_p2(Function<double> const* f, int32_t cell,
+                                   std::array<double, 18>& x, std::array<double, 6>& vals);
+
 } // namespace dolfinx_access
 
 // extern "C" PyObject* PyInit_dolfinx_access();