Backwards compatibility for BLE4 for CODED PHY advertising?

[Luke.L]

I am wondering whether it is possible to maintain backwards compatibility for BL4 while also taking advantage of the BLE5 LR CODED PHY?

I am guessing I could scan in AUTO_PHY for one interval cycle before switching to CODED PHY, but how would that affect Bonding afterwards?

If it is possible, could we scan in both AUTO_PHY and CODED PHY?

[Luke.L]

Oh actually this cropped up

https://devzone.nordicsemi.com/f/nordic-q-a/35596/advertising-on-two-different-phy-simultaneously

and I am indeed on the latest soft device version, are there any samples for this alternating PHY?