Yes, indeed it can be called biofertilizers, and you can see many colleagues have already provided you with published results as evidence. Having said that, I would also draw your attention that many microorganisms including Trichoderma spp. can trigger induced systemic resistance in plants. Refer to the following reference:
Yes it is biological fertilizer that reduces not only the load of chemical fertilizers in crop production but also minimizes the pollution by excessive uses of the chemical fertilizers.
i worked with Trichoderma hamatum as biofertilizer with cucumber and wheat, but with other fungi (Aspergillus) as plant growth promoting fungi and i have significant results in this field. will see last manuscript with wheat.
but with cucumber i use it in soilless culture in plastic bags in greenhouse but not published yet, my recommend that you should test any plant substrate or compost for compatible with any plant host as commercial product.