Open a new Writer document. Insert → Image and choose an image. Right mouse click on image. Anchor → to page isn't shown. Switch to the toolbar and the anchor-symbol. The same: to page isn't shown. Only in the properties of the image you could choose anchor → to page. The possibility to set it "to page" is there every time in LO 7.0.4.2, it fails in context menu and in toolbar since LO 7.1.0.1, also 7.1.0.2 on OpenSUSE 15.2 64bit rpm Linux.
I confirm it with Version: 7.1.0.3 (x64) / LibreOffice Community Build ID: f6099ecf3d29644b5008cc8f48f42f4a40986e4c CPU threads: 4; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win Locale: de-DE (de_DE); UI: en-GB Calc: CL
It was removed in Bug 135836.
(In reply to Maxim Monastirsky from comment #2) > It was removed in Bug 135836. => So this means WONTFIX? cc: Heiko, please decide (Your prophecy from bug 135836 comment 4 came true).
Now the option is here: Right click on image - Properties - Type - and you can change here to Anchor to page.
(In reply to Dieter from comment #3) > cc: Heiko, please decide (Your prophecy from bug 135836 comment 4 came true). :-) (the advocates of removal had a point and I can support the decision)