  Ferromagnetism and superconductivity are two key ingredients to create
non-Abelian quasiparticle excitations that are expected as building blocks to
construct topological quantum computers. Adversely, ferromagnetism and
superconductivity are typically also two hostile orderings competing to align
spins in different configurations, making the material design and experimental
implementation extremely challenging. Recently, iron-based superconductor
Fe(Te,Se) has emerged as a connate topological superconductor (TSC), which
differentiates itself from other hybrid TSCs by self-proximitizing its Dirac
surface states with bulk superconductivity. So far, the efforts to search for
Majorana states in this material are prevalently focused on spectroscopy
techniques. In this paper, we present the global transport signature of
interfacial magnetism coexisting with superconductivity. Time-reversal symmetry
breaking superconducting states are confirmed through device level transport
measurements for the first time in a van der Waals (vdW) Josephson junction
structure. Magnetic hysteresis is observed in this device scheme, which only
appears below the superconducting critical temperature, leading to potential
Fulde-Ferrell (FF) superconducting pairing mechanisms. The 0-{\pi} phase mixing
in the Fraunhofer patterns pinpoints the ferromagnetic state dwelling on the
surface. Furthermore, a stochastic field-free superconducting diode effect also
confirms the spontaneous time-reversal symmetry breaking which reflects the
behavior of the ferromagnetism. Our work paves a new way to explore topological
superconductivity in iron-based superconductors for future high Tc
fault-tolerant qubit implementations from a device perspective.
