Both JP and NA Summon Simulators have a 0.8% rate for Rate-up SSR Servants and 11 pulls (1 free pull every 30 SQ or every 10 tickets).
The JP Sim now has a Pity system, guaranteeing the rate-up SSR Servant at 330 pulls (30x 11-pulls) starting with the New Year's 2022 (JP) banner. Note, however, this pity does NOT carry across rotating banners.
Link to NA Summon Sim
List of all Summoning Campaigns
JP Summon Simulator