For on-prem we power the laptop up and do a courtesy 'fresh wipe' before handing it over. That way, the bloatware is gone and the laptop is 100% charged. If it's a 100% remote onboarding, with the laptop delivered direct from vendor, it's a little longer. But, not far off.
Also implemented a "first week" chat channel per new starter, to resolve any snagging without needing tickets - as long as the requirement supports the BAU of the role. The channel gets archived after 1wk, tagged onto their onboarding ticket, and serves as a audit trail for the onboarding. K.I.S.S.