There are a couple of ways to get a redundancy analysis. One is through a macro installed with the Examples data. See https://www.ibm.com/docs/en/spss-statistics/27.0.0?topic=macros-canonical-correlation-macro for the instructions on using this macro.
The other option is the old MANOVA procedure, which is also available only via syntax. An example would be:
MANOVA y1 y2 y3 WITH x1 x2 x3 x4
/DISCRIM ALL.
The output of primary interest is in the sections "Variance in dependent variables explained by canonical variables" and "Variance in covariates explained by canonical variables".
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