You might need to phone, text, drop in, email and/or snail mail an old employer to make sure they know where to send your W-2.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-forms/get-copy-w-2/L8FTim9MO_US_en_US?uid=m68ee4os
You can get a wage and income transcript from the IRS: It will not show the actual W-2, 1099’s, etc, but will show the income information the IRS received. It will not, however, show your state information. It will only show the federal information.
https://www.irs.gov/individuals/get-transcript
Other ways to get W-2’s:
Pay Social Security $62 per tax year for your W-2’s.:
https://faq.ssa.gov/en-US/Topic/article/KA-02501