GM had to engineer HARD to get the Bolt EV under the $30k MSRP they promised back in the day. This led to dumb stuff like making the DCFC port optional for the first several model years - that should always have been STANDARD on all Bolts no exception. The early Bolts, up through 2021 (somebody correct me if I'm wrong) came from the factory with only the L1 charger option. If they had included a proper L2 EVSE the Bolt would have cost at least $500 more (remember EVSEs, especially in the higher amperage ranges, used to be a LOT more expensive even just a few years ago). The dual-level cord was introduced with the EUV in 2022 if I'm remembering correctly. GM felt able to be a little more liberal with the price on the EUV since they never promised to keep it under $30k. Hence the dual-level came standard on the EUV, but was optional on the EV (at added cost of course).
True story: the early versions of the 120v L1 EVSE can in fact operate on 240v, using an appropriate adapter cable (or cables - there's more than one way to skin this cat). Basically doubles it's power output with no other changes. If the OP indeed has the original L1 EVSE then this would be an option - just buy the appropriate adapter(s) and plug her in. However, this is an unsupported use of the original L1 EVSE. If anything goes sideways, it's on the OP's head. I will not advise one way or the other - Google is your friend and I know there are many members here that have tried this and posted their experiences. Just throwing out a further tidbit of info for the OP's perusal.
My opinion: if the OP does indeed have the original L1 EVSE, I'd advise to keep it at home and keep using it as always. It's obviously been getting them by. Buy a NEW L2 EVSE with a NEMA 14-50 plug to use at work. Many fine brands out there - Clipper Creek, Juice Box, Emporia, Grizzl-E, and Lectron are just a few that come to mind. AVOID the CHEAP Amazon junk. If it costs much less than $400 then it's likely cheap Chinese knockoff junk. Avoid those cheap chargers - they're dumpster fires waiting to happen. It's worth spending the money on an EVSE you can rely on.