The point is not to looking for documentation supporting what your client desire...but to look for feature supported by devices your client is using (or want to use): does the Layer 3 Switch your client own (why your title refers to HPE OfficeConnect 1920S which is not a full-Layer 3 [*] Switch?) support IPsec VPN Tunnel(s) as the 3Com router does?
[*] And yes...a Switch that support IP Routing supports routing between VLANs it manages, this generally is true also for Switches supporting Layer3 in a lite fashion (so also for not full-Layer 3 Switches).