Is Poincaré duality for étale motivic cohomology known for projective regular (not necessarily smooth, just regular) schemes over Dedekind rings?

More precisely, two questions. Let $f: \mathcal{X}\to\text{Spec}(R)$ be a regular projective morphism of pure relative dimension $d$, with $R$ Dedekind, and let $\mathbf{Z}(j)_{\mathcal{X}}$ be the Bloch cycle complex.

**(1.1)** Is there a perfect pairing:

$$H^i(\mathcal{X}_{\rm et}, \mathbf{Z}(j))\times H^{2d-i}(\mathcal{X}_{\rm et}, \mathbf{Z}(d-j))\to H^{2d}(\mathcal{X}_{\rm et},\mathbf{Z}(d))\simeq \mathbf{Z}\ ?$$

For $f$ *smooth* projective, same question.

**(1.2)** What if one replaces $H^{2d-i}(\mathcal{X}_{\rm et},\mathbf{Z}(j))$ with Borel-Moore homology in the appropriate degree and weight?

**(2.1)** Is there always a multiplication map

$$\mathbf{Z}(i)\otimes^{L}_{\mathbf{Z}}\mathbf{Z}(j)\to\mathbf{Z}(i+j)$$ and is it an isomorphism in $D(\text{Ab})$?

**(2.2)** Can one relate the two objects in $D(\text{Ab})$:
$$\text{Hom}_{D(\text{Ab})}(\mathbf{Z}(i),\mathbf{Z}[p])\ \ \text{and}\ \ \mathbf{Z}(-i)[2d-p]$$
(with a different shift, if necessary)?

**Actual scope:**

More generally, I'd be interested in any result allowing a description of $$\text{Hom}_{\mathbf{Z}}(H^p(\mathcal{X}_{\rm et},\mathbf{Z}(i)),\mathbf{Z})$$ in terms of the other étale motivic cohomology groups of $\mathcal{X}$ (eg. as a direct sum of some of them), on the condition that such result is valid for $\mathcal{X}$ over a **Dedekind** base.

I would benefit a lot from a precise reference.