The keyboard is integrated into the palmrest, so you need the upper case assembly. I did a quick search on Encompass and Lenovo’s support pages, and I cannot find a part number for you there. You will want to verify this, but the part number appears to be 3RST6TALV10.
Once you have an exact Lenovo P/N, check here (Encompass) or search the machine type, and then check under the support page.
In order to better locate the info for your Flex 14, we need to know the model of it beyond what you have provided.
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
2