Ask them what they need. They’re professionals, and you should treat them as such.
Give them time to learn the tools they use. They need to master those tools, and they can’t do that if their managers and work load don’t provide ample “maker time.”
Give them time to learn other things to upskill. And don’t make it a lunch-and-learn or make them work overtime. Make it part of their workday. Making it part of their extracurricular activities or taking away from family/friend time only discourages learning.