In the framework of the LIU project, the whole injector chain has undergone substantial modifications during LS2. While 2021 operations in the injectors has mostly focused on the the re-establishment of pre-LS2 beam performance of the non-LHC-type fixed target beams, a large effort has been invested to commission the LHC proton and lead ion beams during machine development and special commissioning periods. Thanks to these studies the LIU intensity and brightness ramp up for proton beams and the SPS slip stacking commissioning for ion beams are already well underway. This contribution summarises the 2021 experience with LHC beams in the injectors and highlights the challenges faced. Furthermore, the available beam types and the expected performance for LHC operation in 2022 are presented, together with an outlook of beam parameters to be expected throughout Run 3.