Morgan Stanley BV 6.71% S&P/EurStoxx 2028 – BW6SFN9
This is clearly a security.
If you accept nothing could be found anything using the ISIN or SEDOL but the Notes (‘securities’ for ISA purposes) is Morgan Stanley B.V then to qualify for ISA inclusion, either the security or the shares in the issuing company need to be listed on a recognised stock exchange or admitted to trading on a recognised stock exchange in the European Economic Area (EEA) or the UK (see ISA Guidance https://www.gov.uk/guidance/stocks-and-shares-investments-for-isa-managers#compsecur ).
The shares in the issuing company (Morgan Stanley BV) do meet the listing requirement (i.e., listed on a recognised stock exchange) so this security will be ISA qualifying (despite the partial cancellation).