Does this help?

Since we are close to release, I'm intentionally making it a seperate
block, and we can trust the compiler's common-subexpression-elimination
to clean it up.  If there was a 3rd entry we would  make it a switch().

Index: kern_pledge.c
===================================================================
RCS file: /cvs/src/sys/kern/kern_pledge.c,v
diff -u -p -u -r1.319 kern_pledge.c
--- kern_pledge.c	4 Sep 2024 07:45:08 -0000	1.319
+++ kern_pledge.c	23 Sep 2024 21:00:17 -0000
@@ -997,6 +997,11 @@ pledge_sysctl(struct proc *p, int miblen
 	    mib[0] == CTL_MACHDEP && mib[1] == CPU_ID_AA64ISAR0)
 		return (0);
 #endif /* CPU_ID_AA64ISAR0 */
+#ifdef CPU_ID_AA64ISAR1
+	if (miblen == 2 &&		/* arm64 libcrypto inspects CPU features */
+	    mib[0] == CTL_MACHDEP && mib[1] == CPU_ID_AA64ISAR1)
+		return (0);
+#endif /* CPU_ID_AA64ISAR1 */
 
 	snprintf(buf, sizeof(buf), "%s(%d): pledge sysctl %d:",
 	    p->p_p->ps_comm, p->p_p->ps_pid, miblen);